lift

L0160800 (lĭft)v. lift·ed, lift·ing, lifts v.tr.1. a. To direct or carry from a lower to a higher position; raise: lift one's eyes; lifted the suitcase.b. To transport by air: The helicopter lifted the entire team to the meet.2. a. To revoke by taking back; rescind: lifted the embargo.b. To bring an end to (a blockade or siege) by removing forces.3. To cease (artillery fire) in an area.4. a. To raise in condition, rank, or esteem: work that lifted her in the eyes of her colleagues.b. To uplift; elate: Your telephone call really lifted my spirits.5. To remove (plants) from the ground for transplanting.6. To project or sound in loud, clear tones: lifted their voices in song.7. Informal To steal; pilfer: A thief lifted my wallet.8. Informal To copy from something already published; plagiarize: lifted whole paragraphs from the encyclopedia.9. To pay off or clear (a debt or mortgage, for example).10. To perform cosmetic surgery on (the face, for example), especially in order to remove wrinkles or sagging skin.11. a. Sports To hit (a golf ball) very high into the air.b. To pick up (a golf ball) to place it in a better lie.c. To shoot or flip (a puck) so that it rises sharply off the ice.v.intr.1. a. To rise; ascend.b. To yield to upward pressure: These windows lift easily.2. a. To disappear or disperse by or as if by rising: By afternoon the smog had lifted.b. To stop temporarily: The rain lifted by morning.3. To become elevated; soar: Their spirits lifted when help came.n.1. The act or process of rising or raising to a higher position.2. Power or force available for raising: the lift of a pump.3. An organized effort or a flight transporting supplies or people by airplane; an airlift.4. a. The extent or height to which something is raised or rises; the amount of elevation.b. The distance or space through which something is raised or rises.5. A rise or an elevation in the level of the ground.6. An elevation of the spirits: The good news gave us a lift.7. A raised, high, or erect position, as of a part of the body: the lift of his chin.8. A machine or device designed to pick up, raise, or carry something.9. One of the layers of leather, rubber, or other material making up the heel of a shoe.10. Chiefly British A passenger or cargo elevator.11. A ride in a vehicle given to help someone reach a destination: gave my friend a lift into town.12. Assistance or help: gave her a lift with her heavy packages.13. A set of pumps used in a mine.14. The component of the total aerodynamic force acting on an airfoil or on an entire aircraft or winged missile perpendicular to the relative wind and normally exerted in an upward direction, opposing the pull of gravity.Phrasal Verb: lift off To begin flight: The spacecraft lifted off at noon.Idiom: lift fire To increase the range of artillery fire by elevating the muzzle of a piece.

[Middle English liften, from Old Norse lypta.]

lift′a·ble adj.lift′er n.Synonyms: lift, raise, elevate, hoist, heave, boost
These verbs mean to move something from a lower to a higher level or position. Lift sometimes stresses the expenditure of effort: a trunk too heavy to lift. Raise often implies movement to an approximately vertical position: raised my hand so I could ask a question. Elevate emphasizes the sustained or permanent status of the change in position: elevated his sprained ankle; elevated the highway over major thoroughfares. Hoist is applied principally to the lifting of heavy objects, often by mechanical means: hoist a sunken ship. To heave is to lift or raise with great effort or force: heaved the pack onto his back. Boost suggests upward movement effected by pushing from below: boosted the child into the saddle. See Also Synonyms at steal.

lift

(lɪft) vb1. to rise or cause to rise upwards from the ground or another support to a higher place: to lift a sack. 2. to move or cause to move upwards: to lift one's eyes. 3. (tr) to take hold of in order to carry or remove: to lift something down from a shelf. 4. (tr) to raise in status, spirituality, estimation, etc: his position lifted him from the common crowd. 5. (tr) to revoke or rescind: to lift tax restrictions. 6. to make or become audible or louder: to lift one's voice in song. 7. (tr) to take (plants or underground crops) out of the ground for transplanting or harvesting8. (intr) to disappear by lifting or as if by lifting: the fog lifted. 9. to transport in a vehicle10. (tr) informal to take unlawfully or dishonourably; steal11. (tr) informal to make dishonest use of (another person's idea, writing, etc); plagiarize12. (tr) slang to arrest13. (tr) to perform a face-lift on14. (Banking & Finance) (tr) US and Canadian to pay off (a mortgage, etc)n15. the act or an instance of lifting16. the power or force available or used for lifting17. (Mechanical Engineering) a. Brit a platform, compartment, or cage raised or lowered in a vertical shaft to transport persons or goods in a building. US and Canadian word: elevator b. See chairlift, ski lift18. the distance or degree to which something is lifted19. a usually free ride as a passenger in a car or other vehicle20. a rise in the height of the ground21. a rise in morale or feeling of cheerfulness usually caused by some specific thing or event22. (General Physics) the force required to lift an object23. (Clothing & Fashion) a layer of the heel of a shoe, etc, or a detachable pad inside the shoe to give the wearer added height24. aid; help25. (Mining & Quarrying) mining a. the thickness of ore extracted in one operationb. a set of pumps used in a mine26. (Aeronautics) a. the component of the aerodynamic forces acting on a wing, etc, at right angles to the airflowb. the upward force exerted by the gas in a balloon, airship, etc27. (Aeronautics) See airlift¹[C13: from Scandinavian; related to Old Norse lypta, Old English lyft sky; compare loft] ˈliftable adj ˈlifter n

lift

(lɪft) nScot the sky[Old English lyft]

lift

(lɪft)
v.t. 1. to move or bring (something) upward from the ground or other support to a higher position; hoist. 2. to raise or direct upward: to lift one's head. 3. to remove or rescind by an official act, as a ban, curfew, or tax. 4. to stop or put an end to (a boycott, blockade, etc.). 5. to hold up or display on high. 6. to raise in rank, condition, estimation, etc.; elevate or exalt. 7. to make audible or louder, as the voice or something voiced. 8. Informal. to plagiarize. 9. Informal. to steal. 10. airlift (def. 3). 11. to remove (plants and tubers) from the ground, as after harvest or for transplanting. 12. to pay off (a mortgage, promissory note, etc.). v.i. 13. to go up; yield to upward pressure: The balloon lifted. 14. to pull or strain upward in the effort to raise something. 15. to move upward or rise; rise and disperse, as clouds or fog. 16. (of rain) to stop temporarily. 17. to rise to view above the horizon when approached, as land seen from the sea. n. 18. the act of lifting, raising, or rising. 19. the distance that anything rises or is raised. 20. a lifting or raising force. 21. the weight, load, or quantity lifted. 22. an act or instance of helping to climb. 23. a ride in a vehicle, esp. one given to a pedestrian. 24. a feeling of exaltation or uplift. 25. assistance or aid. 26. a device or apparatus for lifting. 27. a movement in which a dancer, skater, etc., lifts up a partner. 28. a. ski lift. b. chair lift. 29. Brit. elevator (def. 2). 30. Informal. a theft. 31. a rise or elevation of ground. 32. the component of force exerted by air on an airfoil in a direction perpendicular to the forward motion and opposite to the pull of gravity. 33. the bottom layer on the heel of a boot or shoe. Idioms: lift a finger or hand, to exert any effort at all. [1250–1300; Middle English < Old Norse lypta, derivative of lopt air, c. Middle High German lüften; compare loft] lift′a•ble, adj. lift′er, n.

lift

(lĭft) An upward force acting on an object. Lift can be caused because an object, such as an air balloon, contains a type of gas that weighs less than air, or because of a low-pressure area above an object, such as a wing, that is moving through a fluid. Compare drag. See Note at aerodynamics.

lift

heavy - From the Proto-Germanic verb khabjan, "lift," came the noun khabiz, "weight," which begat the Dutch hevig and then English heavy.
hover - Comes from hove, "raise, lift, rise" or "linger, wait."
lift - The action of cutting a deck of cards used to be called the lift.
weigh - First meant "carry, lift, bear, raise up."

lift

elevator">elevator1. 'lift'

In British English, a lift is a device that moves up and down inside a tall building and carries people from one floor to another.

I took the lift to the eighth floor.2. 'elevator'

In American English, a device like this is called an elevator.

lift

Past participle: lifted
Gerund: lifting

Imperative
lift
lift

Present
I lift
you lift
he/she/it lifts
we lift
you lift
they lift

Preterite
I lifted
you lifted
he/she/it lifted
we lifted
you lifted
they lifted

Present Continuous
I am lifting
you are lifting
he/she/it is lifting
we are lifting
you are lifting
they are lifting

Present Perfect
I have lifted
you have lifted
he/she/it has lifted
we have lifted
you have lifted
they have lifted

Past Continuous
I was lifting
you were lifting
he/she/it was lifting
we were lifting
you were lifting
they were lifting

Past Perfect
I had lifted
you had lifted
he/she/it had lifted
we had lifted
you had lifted
they had lifted

Future
I will lift
you will lift
he/she/it will lift
we will lift
you will lift
they will lift

Future Perfect
I will have lifted
you will have lifted
he/she/it will have lifted
we will have lifted
you will have lifted
they will have lifted

Future Continuous
I will be lifting
you will be lifting
he/she/it will be lifting
we will be lifting
you will be lifting
they will be lifting

Present Perfect Continuous
I have been lifting
you have been lifting
he/she/it has been lifting
we have been lifting
you have been lifting
they have been lifting

Future Perfect Continuous
I will have been lifting
you will have been lifting
he/she/it will have been lifting
we will have been lifting
you will have been lifting
they will have been lifting

Past Perfect Continuous
I had been lifting
you had been lifting
he/she/it had been lifting
we had been lifting
you had been lifting
they had been lifting

Conditional
I would lift
you would lift
he/she/it would lift
we would lift
you would lift
they would lift

Past Conditional
I would have lifted
you would have lifted
he/she/it would have lifted
we would have lifted
you would have lifted
they would have lifted

lift

1. elevator2. (in an automobile) ride

Thesaurus

Noun	1.	lift - the act of giving temporary assistanceassist, assistance, help, aid - the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose; "he gave me an assist with the housework"; "could not walk without assistance"; "rescue party went to their aid"; "offered his help in unloading"
	2.	lift - the component of the aerodynamic forces acting on an airfoil that opposes gravityaerodynamic liftaerodynamic force - forces acting on airfoils in motion relative to the air (or other gaseous fluids)ground effect - apparent increase in aerodynamic lift experienced by an aircraft flying close to the ground
	3.	lift - the event of something being raised upward; "an elevation of the temperature in the afternoon"; "a raising of the land resulting from volcanic activity"elevation, raisingrising, ascension, ascent, rise - a movement upward; "they cheered the rise of the hot-air balloon"
	4.	lift - a wave that lifts the surface of the water or groundrisemoving ridge, wave - one of a series of ridges that moves across the surface of a liquid (especially across a large body of water)
	5.	lift - a powered conveyance that carries skiers up a hillski lift, ski towchair lift, chairlift - a ski lift on which riders (skiers or sightseers) are seated and carried up or down a mountainside; seats are hung from an endless overhead cabletransport, conveyance - something that serves as a means of transportationrope tow - a ski tow offering only a moving rope to hold ontosurface lift - a ski tow that pulls skiers up a slope without lifting them off the ground
	6.	lift - a device worn in a shoe or boot to make the wearer look taller or to correct a shortened legdevice - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
	7.	lift - one of the layers forming the heel of a shoe or bootheel - the bottom of a shoe or boot; the back part of a shoe or boot that touches the ground and provides elevationlayer, bed - single thickness of usually some homogeneous substance; "slices of hard-boiled egg on a bed of spinach"top lift - the bottom layer of a heel
	8.	lift - lifting device consisting of a platform or cage that is raised and lowered mechanically in a vertical shaft in order to move people from one floor to another in a buildingelevatorbuilding, edifice - a structure that has a roof and walls and stands more or less permanently in one place; "there was a three-story building on the corner"; "it was an imposing edifice"elevator car, car - where passengers ride up and down; "the car was on the top floor"dumbwaiter, food elevator - a small elevator used to convey food (or other goods) from one floor of a building to anotherfreight elevator, service elevator - an elevator designed for carrying freightlifting device - a device for lifting heavy loadspaternoster - a type of lift having a chain of open compartments that move continually in an endless loop so that (agile) passengers can step on or off at each floor
	9.	lift - plastic surgery to remove wrinkles and other signs of aging from your face; an incision is made near the hair line and skin is pulled back and excess tissue is excised; "some actresses have more than one face lift"facelift, nip and tuck, rhytidectomy, rhytidoplasty, cosmetic surgery, face lift, face liftingnose job, rhinoplasty - cosmetic surgery to improve the appearance of your noseanaplasty, plastic surgery, reconstructive surgery - surgery concerned with therapeutic or cosmetic reformation of tissue
	10.	lift - transportation of people or goods by air (especially when other means of access are unavailable)airlifttransfer, transferral, transportation, conveyance, transport - the act of moving something from one location to another
	11.	lift - a ride in a car; "he gave me a lift home"ride, drive - a journey in a vehicle (usually an automobile); "he took the family for a drive in his new car"
	12.	lift - the act of raising something; "he responded with a lift of his eyebrow"; "fireman learn several different raises for getting ladders up"raise, heaveactuation, propulsion - the act of propelling
Verb	1.	lift - raise from a lower to a higher position; "Raise your hands"; "Lift a load"elevate, raise, get up, bring upget up - cause to rise; "The sergeant got us up at 2 A.M."jack, jack up - lift with a special device; "jack up the car so you can change the tire"shoulder - lift onto one's shoulderskick up - cause to rise by kicking; "kick up dust"hoist, wind, lift - raise or haul up with or as if with mechanical help; "hoist the bicycle onto the roof of the car"trice, trice up - raise with a line; "trice a window shade"run up, hoist - raise; "hoist the flags"; "hoist a sail"hoist - move from one place to another by lifting; "They hoisted the patient onto the operating table"move, displace - cause to move or shift into a new position or place, both in a concrete and in an abstract sense; "Move those boxes into the corner, please"; "I'm moving my money to another bank"; "The director moved more responsibilities onto his new assistant"pump - raise (gases or fluids) with a pumplevitate - cause to rise in the air and float, as if in defiance of gravity; "The magician levitated the woman"underlay - raise or support (the level of printing) by inserting a piece of paper or cardboard under the type; "underlay the plate"skid - elevate onto skidspinnacle - raise on or as if on a pinnacle; "He did not want to be pinnacled"chin, chin up - raise oneself while hanging from one's hands until one's chin is level with the support barleaven, prove, raise - cause to puff up with a leaven; "unleavened bread"heighten - increase the height of; "The athletes kept jumping over the steadily heightened bars"boost, hike, hike up - increase; "The landlord hiked up the rents"gather up, lift up, pick up - take and lift upwarderect, rear - cause to rise upgather up, lift up, pick up - take and lift upward
	2.	lift - take hold of something and move it to a different location; "lift the box onto the table"heave up, heft, heft up, heave - lift or elevatefork, pitchfork - lift with a pitchfork; "pitchfork hay"move, displace - cause to move or shift into a new position or place, both in a concrete and in an abstract sense; "Move those boxes into the corner, please"; "I'm moving my money to another bank"; "The director moved more responsibilities onto his new assistant"
	3.	lift - move upwards; "lift one's eyes"raisemove, displace - cause to move or shift into a new position or place, both in a concrete and in an abstract sense; "Move those boxes into the corner, please"; "I'm moving my money to another bank"; "The director moved more responsibilities onto his new assistant"
	4.	lift - move upward; "The fog lifted"; "The smoke arose from the forest fire"; "The mist uprose from the meadows"go up, rise, move up, arise, come up, uprisego, locomote, move, travel - change location; move, travel, or proceed, also metaphorically; "How fast does your new car go?"; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast"scend, surge - rise or heave upward under the influence of a natural force such as a wave; "the boats surged"climb, climb up, go up, mount - go upward with gradual or continuous progress; "Did you ever climb up the hill behind your house?"soar, soar up, soar upwards, surge, zoom - rise rapidly; "the dollar soared against the yen"go up - be erected, built, or constructed; "New buildings are going up everywhere"rocket, skyrocket - shoot up abruptly, like a rocket; "prices skyrocketed"bubble - rise in bubbles or as if in bubbles; "bubble to the surface"uplift - lift up from the earth, as by geologic forces; "the earth's movement uplifted this part of town"chandelle - climb suddenly and steeply; "The airplane chandelled"steam - rise as vaporuprise, ascend, come up, rise - come up, of celestial bodies; "The sun also rises"; "The sun uprising sees the dusk night fled..."; "Jupiter ascends"
	5.	lift - make audible; "He lifted a war whoop"let loose, let out, utter, emit - express audibly; utter sounds (not necessarily words); "She let out a big heavy sigh"; "He uttered strange sounds that nobody could understand"
	6.	lift - cancel officially; "He revoked the ban on smoking"; "lift an embargo"; "vacate a death sentence"countermand, repeal, rescind, revoke, annul, vacate, reverse, overturngo back on, renege, renege on, renegue on - fail to fulfill a promise or obligation; "She backed out of her promise"strike down, cancel - declare null and void; make ineffective; "Cancel the election results"; "strike down a law"
	7.	lift - make off with belongings of others cabbage, filch, pilfer, purloin, snarf, abstract, nobble, swipe, sneak, pinch, hooksteal - take without the owner's consent; "Someone stole my wallet on the train"; "This author stole entire paragraphs from my dissertation"
	8.	lift - raise or haul up with or as if with mechanical help; "hoist the bicycle onto the roof of the car"hoist, windtrice, trice up - hoist up or in and lash or secure with a small ropelift, raise, elevate, get up, bring up - raise from a lower to a higher position; "Raise your hands"; "Lift a load"
	9.	lift - invigorate or heighten; "lift my spirits"; "lift his ego"raiseameliorate, improve, meliorate, amend, better - to make better; "The editor improved the manuscript with his changes"
	10.	lift - raise in rank or condition; "The new law lifted many people from poverty"elevate, raisealter, change, modify - cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"dignify - raise the status of; "I shall not dignify this insensitive remark with an answer"exalt - raise in rank, character, or status; "exalted the humble shoemaker to the rank of King's adviser"
	11.	lift - take off or away by decreasing; "lift the pressure"remove, take away, withdraw, take - remove something concrete, as by lifting, pushing, or taking off, or remove something abstract; "remove a threat"; "remove a wrapper"; "Remove the dirty dishes from the table"; "take the gun from your pocket"; "This machine withdraws heat from the environment"
	12.	lift - rise up; "The building rose before them"rear, riseappear, seem, look - give a certain impression or have a certain outward aspect; "She seems to be sleeping"; "This appears to be a very difficult problem"; "This project looks fishy"; "They appeared like people who had not eaten or slept for a long time"hulk, tower, loom, predominate - appear very large or occupy a commanding position; "The huge sculpture predominates over the fountain"; "Large shadows loomed on the canyon wall"
	13.	lift - pay off (a mortgage)liquidate, pay off - eliminate by paying off (debts)
	14.	lift - take without referencing from someone else's writing or speech; of intellectual propertyplagiarise, plagiarizecrime, criminal offence, criminal offense, law-breaking, offense, offence - (criminal law) an act punishable by law; usually considered an evil act; "a long record of crimes"crib - take unauthorized (intellectual material)steal - take without the owner's consent; "Someone stole my wallet on the train"; "This author stole entire paragraphs from my dissertation"
	15.	lift - take illegally; "rustle cattle"rustlecrime, criminal offence, criminal offense, law-breaking, offense, offence - (criminal law) an act punishable by law; usually considered an evil act; "a long record of crimes"steal - take without the owner's consent; "Someone stole my wallet on the train"; "This author stole entire paragraphs from my dissertation"
	16.	lift - fly people or goods to or from places not accessible by other means; "Food is airlifted into Bosnia"airliftfly - transport by aeroplane; "We fly flowers from the Caribbean to North America"
	17.	lift - take (root crops) out of the ground; "lift potatoes"dig, dig out - create by digging; "dig a hole"; "dig out a channel"
	18.	lift - call to stop the hunt or to retire, as of hunting dogssend for, call - order, request, or command to come; "She was called into the director's office"; "Call the police!"
	19.	lift - rise upward, as from pressure or moisture; "The floor is lifting slowly"warp, buckle, heave - bend out of shape, as under pressure or from heat; "The highway buckled during the heat wave"
	20.	lift - put an end to; "lift a ban"; "raise a siege"raiseterminate, end - bring to an end or halt; "She ended their friendship when she found out that he had once been convicted of a crime"; "The attack on Poland terminated the relatively peaceful period after WW I"
	21.	lift - remove (hair) by scalpingscalp - remove the scalp of; "The enemies were scalped"
	22.	lift - remove from a seedbed or from a nursery; "lift the tulip bulbs"remove, take away, withdraw, take - remove something concrete, as by lifting, pushing, or taking off, or remove something abstract; "remove a threat"; "remove a wrapper"; "Remove the dirty dishes from the table"; "take the gun from your pocket"; "This machine withdraws heat from the environment"
	23.	lift - remove from a surface; "the detective carefully lifted some fingerprints from the table"remove, take away, withdraw, take - remove something concrete, as by lifting, pushing, or taking off, or remove something abstract; "remove a threat"; "remove a wrapper"; "Remove the dirty dishes from the table"; "take the gun from your pocket"; "This machine withdraws heat from the environment"
	24.	lift - perform cosmetic surgery on someone's faceface-liftoperate on, operate - perform surgery on; "The doctors operated on the patient but failed to save his life"

lift

verb1. raise, pick up, hoist, draw up, elevate, uplift, heave up, buoy up, raise high, bear aloft, upheave, upraise Curious shoppers lifted their children to take a closer look at the parade.
raise drop, lower2. revoke, end, remove, withdraw, stop, relax, cancel, terminate, rescind, annul, countermand The Commission has urged them to lift their ban on imports.
revoke establish, impose3. exalt, raise, improve, advance, promote, boost, enhance, upgrade, elevate, dignify, cheer up, perk up, ameliorate, buoy up A brisk walk in the fresh air can lift your mood.
exalt depress4. disappear, clear, vanish, disperse, dissipate, rise, be dispelled The fog had lifted and revealed a warm sunny day.5. (Informal) steal, take, copy, appropriate, nick (slang, chiefly Brit.), pocket, trouser (slang), pinch (informal), pirate, cabbage (Brit. slang), knock off (slang), crib (informal), half-inch (old-fashioned slang), blag (slang), pilfer, purloin, plagiarize, thieve The line could have been lifted from a Woody Allen film.noun1. boost, encouragement, stimulus, reassurance, uplift, pick-me-up, fillip, shot in the arm (informal), gee-up My selection for the team has given me a tremendous lift.
boost blow, letdown2. elevator (chiefly U.S.), hoist, paternoster They took the lift to the fourth floor.3. ride, run, drive, transport, hitch (informal), car ride He had a car and often gave me a lift home.lift off take off, be launched, blast off, take to the air The plane lifted off and climbed steeply into the night sky.

lift

verb1. To move (something) to a higher position:boost, elevate, heave, hoist, pick up, raise, rear, take up, uphold, uplift, upraise, uprear.2. To move from a lower to a higher position:arise, ascend, climb, mount, rise, soar.3. To rise up in flight.Also used with off:take off.4. To disappear by or as if by rising:disperse, dissipate, scatter.5. To take back or remove:recall, repeal, rescind, reverse, revoke.6. To raise the spirits of:animate, buoy (up), elate, elevate, exhilarate, flush, inspire, inspirit, uplift.Obsolete: exalt.7. Informal. To take (another's property) without permission:filch, pilfer, purloin, snatch, steal, thieve.Informal: swipe.Slang: cop, heist, hook, nip, pinch, rip off, snitch.Idiom: make off with.noun1. An instance of lifting or being lifted:boost, heave, hoist.2. High spirits:animation, elatedness, elation, euphoria, exaltation, exhilaration, inspiration, uplift.3. A strong, pleasant feeling of excitement or stimulation:thrill.Informal: wallop.Slang: bang, boot, high, kick.

Translations

举起电梯舉鼓舞升起

lift

(lift) verb1. to raise or bring to a higher position. The box was so heavy I couldn't lift it. 提起，抬起，举起 2. to take and carry away. He lifted the table through into the kitchen.拿走3. (of mist etc) to disappear. By noon, the fog was beginning to lift.消散4. to rise. The aeroplane lifted into the air.升起 noun1. the act of lifting. a lift of the eyebrows. 提，抬，舉 2. (American ˈelevator) a small enclosed platform etc that moves up and down between floors carrying goods or people. Since she was too tired to climb the stairs, she went up in the lift.电梯3. a ride in someone's car etc. Can I give you a lift into town?搭便车4. a raising of the spirits. Her success in the exam gave her a great lift.鼓舞lift off (of a rocket etc) to leave the ground ( ˈlift-off) noun 发射升空，起飞

lift

→ 举起zhCN, 搭车zhCN, 电梯zhCN

Could you give me a ride to the repair shop? (US)
Can you give me a lift to the garage? (UK) → 我能搭您的车去修车行吗？
Is there an elevator in the building? (US)
Is there a lift in the building? (UK) → 这座楼里有电梯吗？
Do you have a wheelchair lift? (US)
Do you have a lift for wheelchairs? (UK) → 你们有可供轮椅使用的电梯吗？
Is there an elevator? (US)
Is there a lift? (UK) → 有电梯吗？
Where is the elevator? (US)
Where is the lift? (UK) → 电梯在哪儿？

lift

1. a. Brit a platform, compartment, or cage raised or lowered in a vertical shaft to transport persons or goods in a building b. See chairlift ski lift2. the force required to lift an object 3. a. the component of the aerodynamic forces acting on a wing, etc., at right angles to the airflow b. the upward force exerted by the gas in a balloon, airship, etc. 4. See airlift

Lift

For a body moving in a liquid or gaseous medium, the lift acting on the body is the component of the medium’s total pressure force on the body in the direction perpendicular to the velocity of the body—or the velocity of the body’s center of gravity if the body is moving nontranslationally. The lift results from the unsymmetrical flow of the medium around the body. For example, in the case of flow around an airplane wing (Figure 1), the particles of the medium that flow past the lower surface traverse in the same period of time a shorter path than do the particles flowing past the upper, more convex surface. The velocity along the lower surface is consequently less than the velocity along the upper surface. According to Bernoulli’s equation, however, the pressure of the medium is greater where the velocity of the particles is smaller. The pressure of the medium is thus greater on the lower surface of the wing than on the upper surface, and lift results.

< vup,="" and="" the="" pressure="" plow=""> pup; (y) lift on the wing"" height="102" width="252"/>Figure 1. Flow around an airplane-wing profile: the velocity v_low < v_up, and the pressure p_low > p_up; (y) lift on the wing

The unsymmetrical flow around the wing can be viewed as the result of superimposing on a symmetrical stream a circulatory flow around the wing contour. Along the more convex surface the flow moves in the direction of the mainstream, and an increased velocity results. Along the less convex surface the circulatory flow is directed against the mainstream, with a resulting decreased velocity. The lift Y will then depend on the value of the velocity circulation Γ. According to Zhukovskii’s theorem, when an ideal incompressible fluid moves in a two-dimensional parallel flow around the portion of a wing of length L, Y = ρvΓ L, where ρ is the density of the medium and v is the velocity of the oncoming flow.

Since Γ has the dimension of [vl], the lift can be expressed by the equation Y= cy ρSv²/2, which is commonly used in aerodynamics. Here S is a representative area of the body—for example, the plan area of the wing; c_y is the nondimensional lift coefficient, which depends on the shape of the body, the body’s orientation in the medium, the Reynolds number Re, and the Mach number M. The value of c_y can be determined by theoretical calculation or experimental means. Thus, according to Zhukovskii’s theory, for a wing in a two-dimensional parallel flow c_y = 2m(α — α₀), where α is the angle of attack (the angle between the direction of the velocity of the oncoming flow and the wing chord), α₀ is the zero-lift angle, and m is a factor dependent only on the shape of the wing profile—for example, for a thin cambered plate, m = π. In the case of a wing of finite span l, m = π/(1 — 2/λ), where λ = l²/S is the wing’s aspect ratio.

Owing to viscosity, in a real fluid the value of m is smaller than the theoretical value, and the difference increases as the thickness ratio is increased. The value of α₀ is also less than the theoretical value. Moreover, as α increases, the dependence of c_y on α (Figure 2) ceases to be linear, and the quantity dc_y/dα decreases monotonically, becoming zero at the angle of attack α_cr corresponding to the maximum value c_ymax of the lift coefficient. A further increase in α causes a decrease in c_y owing to separation of the boundary layer from the upper surface of the wing. The quantity cy_max is of great importance, since the larger it is, the lower the plane’s takeoff and landing speeds.

At high but subcritical speeds—that is, at speeds for which

Figure 2. Dependence of c_y on α

M < M_cr where M_cr is the value of the Mach number of the oncoming flow at which the local values of the Mach number near the surface of the profile are equal to unity—the compressibility of the gas becomes significant. In the case of slightly cambered and thin profiles, the compressibility for small angles of attack may be taken into account by assuming, as an approximation, that and .

At supersonic speeds the nature of the flow around a body is considerably different. Thus, in the case of flow around a flat plate, rarefaction waves form at the leading edge on the upper surface, and a shock wave forms on the lower surface (Figure 3).

Figure 3. Schematic of supersonic flow around a plate: v_up > v₁, p_up < P₁; V₂ < v_up, p₂ > p_up; v_low < v₁, p_low > p₁; v₃ > v_low, p₃ < p_low

The pressure p_low on the lower surface of the plate consequently becomes greater than the pressure p_up on the upper surface. There results a composite force normal to the plate’s surface. The lift is the component of this force perpendicular to the velocity of the oncoming flow. For small M > 1 and small α, the lift on the plate can be calculated by the formula c_y = . This formula is also valid for thin profiles of arbitrary shape with a sharp leading edge.

REFERENCES

Zhukovskii, N. E. “O prisoedinennykh vikhriakh.” Izbr. soch., vol. 2. Moscow-Leningrad, 1948.
Loitsianskii, L. G. Mekhanika zhidkosti i gaza, 2nd ed. Moscow, 1957.
Golubev, V. V. Lektsii po teorii kryla. Moscow-Leningrad, 1949.
Abramovich, G. N. Prikladnaia gazovaia dinamika, 2nd ed. Moscow, 1953.
Ferri, A. Aerodinamika sverkhzvukovykh techenii. Moscow, 1953. (Translated from English.)

M. IA. IUDELOVICH

What does it mean when you dream about being lifted?

Being lifted in a dream may indicate that the dreamer is rising above unpleasant conditions or issues. Being lifted can also have the same connotations as ascension and height.

lift

[lift] (fluid mechanics) aerodynamic lift (mechanical engineering) elevator (mining engineering) The vertical height traveled by a cage in a shaft. The distance between the first level and the surface or between any two levels. Any of the various gangways from which coal is raised at a slope colliery.

lift

1. An elevator used on the stage of a theater, in the orchestra pit, or on the apron. 2. British term for elevator. 3. A handle or projection from the lower sash in a hung window, used as a grip in raising the sash; also called a sash lift. 4. One of a number of frames of scaffolding erected one above another in a vertical direction. 5. The concrete placed between two consecutive horizontal construction joints; usually consists of several layers or courses. 6. In reinforced concrete construction, that portion of a wall, pier, abutment, etc., placed in a single pour. 7. The amount of grouting or mortar placed at a single time in a building structure. 8. In a multi-level excavation, a bench or step.

lift

i. That component of the aerodynamic forces acting on the wing or airfoil section that opposes gravity. It is perpendicular to the flight path or free-stream flow. Simply put, it is the difference between the static pressure on the airfoil lower surface and that on the airfoil top surface. Lift (L) = coefficient of lift (C_L) ½ × density (ρ) × velocity square (V²) × surface area of airfoil (S), or L = C_L ½ρV²S.
ii. The whole or part of an airborne operation, as in the Berlin Airlift. The terms first lift and second lift also are used in the same sense.

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What does it mean when you dream about being lifted?

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Synonyms for lift

verb raise

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verb revoke

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verb exalt

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verb disappear

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verb steal

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noun boost

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noun elevator

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noun ride

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phrase lift off

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Synonyms for lift

verb to move (something) to a higher position

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verb to move from a lower to a higher position

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verb to rise up in flight

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verb to disappear by or as if by rising

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verb to take back or remove

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verb to raise the spirits of

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verb to take (another's property) without permission

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noun an instance of lifting or being lifted

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noun high spirits

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noun a strong, pleasant feeling of excitement or stimulation