fast

1 of 5

adjective

ˈfast

: firmly fixed

roots fast in the ground

: tightly shut

the drawers were fast

: adhering firmly

The boards were fast a few hours after being glued together.

: not easily freed : stuck

a ball fast in the mouth of the cannon

: stable

movable items were made fast to the deck

: firmly loyal

became fast friends

: characterized by quick motion, operation, or effect:

(1)

: moving or able to move rapidly : swift

a fast horse

(2)

: taking a comparatively short time

a fast race

(3)

: imparting quickness of motion

a fast bowler

(4)

: accomplished quickly

fast work

(5)

: agile of mind

especially : quick to learn

a class for fast students

: conducive to rapidity of play or action

a fast track

c(1)

of a timepiece or weighing device : indicating in advance of what is correct

Your clock is two minutes fast.

(2)

: according to or being daylight saving time

: contributing to a shortening of exposure time

fast film

: acquired with unusually little effort and often by shady or dishonest methods

had a keen eye for a fast buck—

R. A. Keith

: securely attached

a rope fast to the wharf

: tenacious

a fast hold on her purse

archaic : sound asleep

of sleep : not easily disturbed

fell into a fast sleep

: not fading or changing color readily

fast colors

: actively seeking excitement and pleasure : wild

a pretty fast crowd

: sexually promiscuous

: resistant to change (as from destructive action or fading)

fast dyes

—often used in combination

sunfastacid-fast bacteria

fast

2 of 5

adverb

: in a firm or fixed manner

stuck fast

: in a sound manner : deeply

fast asleep

: in a rapid manner : quickly

: in quick succession

: in a reckless or dissipated manner

: ahead of a correct time or schedule

archaic : close, near

fast

3 of 5

verb

fasted; fasting; fasts

intransitive verb

: to abstain from food

: to eat sparingly or abstain from some foods

fast

4 of 5

noun (1)

: the practice of fasting

: a time of fasting

fast

5 of 5

noun (2)

: something that fastens (such as a mooring line) or holds a fastening

Example Sentences

Adjective She's a very fast runner. We're off to a fast start. We're now experiencing a faster rate of inflation. We took the faster route. Adverb The boss expects this to be done this afternoon, so you'd better work fast. He ran as fast as he could. This is fast becoming a national problem. You need to act fast to take advantage of this offer. I don't know what caused the accident. It all happened so fast. She's a woman who can think fast in a crisis. He's going to have to talk fast to get himself out of this mess. The window was stuck fast. She held fast to her belief in justice. We must stand fast and not surrender! Verb She always fasts on Yom Kippur. Patients must fast for six hours before having the procedure. See More

Recent Examples on the Web

Verb

It’s recommended that people fast for eight to 12 hours before the screening, but beyond that, there’s very little prep needed for the CVS heart health screening. —

Julia Landwehr, Health, 10 Feb. 2023 Because of the need to fast, the test is usually done in the morning. —

Verywell Health, 30 Jan. 2023 For starters, Mardi Gras festivities are in full swing in the Big Easy and other places around the globe the last Tuesday before Lent — the six-week period from Ash Wednesday leading up to Easter during which Christians fast, repent and pray. —

Karla Pope, Good Housekeeping, 24 Jan. 2023 While your iPhone may be capped to a charge speed of 18 watts, your MacBook Pro might fast charge at 67 watts. —

Hunter Fenollol, Popular Mechanics, 20 Dec. 2022 The primary intent of the Exipure weight loss pills is to fast forward your weight loss journey by maximizing the production of brown fat cells inside your body. —

James Robinson, Discover Magazine, 14 Dec. 2022 First meeting between programs features running backs off to fast starts this season. —

J.c. Carnahan, Orlando Sentinel, 8 Sep. 2022 Go ahead and fix yourself a fall cocktail while checking out our best fall season quotes to fast forward to autumn. —

Adam Schubak, Country Living, 18 Aug. 2022 In 2019, Menna Shahin had an idea particularly inspired by Ramadan, the Muslim holiday when the devout give to poor people and fast throughout the day. —

Eman Mounir, The Christian Science Monitor, 4 Aug. 2022

Noun

Will a tablespoon of cream in my coffee break my fast? —

Amber Smith, Discover Magazine, 30 Jan. 2023 There’s nothing much worse than spending an evening with a group of people who are about to start a diet, a punitive exercise regime, a detox or a fast. —

Time, 30 Dec. 2022 Starting such a blurry fast, physically demanding sport at 55 might not have been the wisest move. —

Houston Mitchell, Los Angeles Times, 6 Dec. 2022 Owens was two weeks into the fast on November 14 when Cook and Meadows, now 50 and 48 years old, stood before her again. —

Roy S. Johnson | Rjohnson@al.com, al, 5 Dec. 2022 By Wednesday, the fifth day of his fast, John was weakening. —

John Rosengren, Washington Post, 30 Nov. 2022 An iftar is defined by Merriam-Webster as a meal eaten by Muslims at sundown to break the daily fast of Ramadan. —

Hannah Hudnall, USA TODAY, 30 Nov. 2022 Lib also learns the reason Anna was convinced to go along with the religious fast. —

Town & Country, 18 Nov. 2022 With dwindling sea ice, there is less opportunity for polar bears to fatten up in preparation for the annual fast, leaving them food-deprived for longer periods of time. —

Julia Jacobo, ABC News, 10 Nov. 2022 See More

Word History

Etymology

Adjective and Adverb

Middle English, from Old English fæst; akin to Old High German festi firm, Old Norse fastr, Armenian hast

Verb and Noun (1)

Middle English, from Old English fæstan

Noun (2)

alteration of Middle English fest, from Old Norse festr rope, mooring cable, from fastr firm

First Known Use

Adjective

before the 12th century, in the meaning defined at sense 1a

Adverb

before the 12th century, in the meaning defined at sense 1

Verb

before the 12th century, in the meaning defined at sense 1

Noun (1)

12th century, in the meaning defined at sense 1

Noun (2)

15th century, in the meaning defined above

Kids Definition

fast

1 of 4 adjective

ˈfast

: firmly fixed or bound

: tightly shut

: sticking firmly

: firmly loyal

became fast friends

: moving or able to move rapidly

: taking a short time

: giving quickness of motion (as to a thrown ball)

: favorable to speed

the faster route

: indicating ahead of the correct time

my clock is fast

: tricky and unfair

pulled a fast one

: not likely to fade

fast colors

fast

2 of 4 adverb

: in a fixed manner

stuck fast

: in a complete manner : soundly, deeply

fast asleep

: with great speed

a building fast going to ruin

fast

3 of 4 verb

: to go without eating

: to eat in small amounts or only certain foods

fast

4 of 4 noun

: the act of fasting

: a time of fasting

Medical Definition

fast

1 of 3 adjective

ˈfast

: firmly fixed

: having a rapid effect

a fast medicine

: allowing for the rapid passage of a gas or liquid

: resistant to change (as from destructive action)

—used chiefly of organisms and in combination with the agent resisted

acid-fast bacteria

fast

2 of 3 intransitive verb

: to abstain from food

: to eat sparingly or abstain from some foods

transitive verb

: to deny food to

the patient is fasted and given a mild hypnotic—

Lancet

fast

3 of 3 noun

: the practice of fasting

: a time of fasting

单词	fasted
释义	fast 1 of 5 adjective ˈfast 1 a : firmly fixed roots fast in the ground b : tightly shut the drawers were fast c : adhering firmly The boards were fast a few hours after being glued together. d : not easily freed : stuck a ball fast in the mouth of the cannon e : stable movable items were made fast to the deck 2 : firmly loyal became fast friends 3 a : characterized by quick motion, operation, or effect: (1) : moving or able to move rapidly : swift a fast horse (2) : taking a comparatively short time a fast race (3) : imparting quickness of motion a fast bowler (4) : accomplished quickly fast work (5) : agile of mind especially : quick to learn a class for fast students b : conducive to rapidity of play or action a fast track c(1) of a timepiece or weighing device : indicating in advance of what is correct Your clock is two minutes fast. (2) : according to or being daylight saving time d : contributing to a shortening of exposure time fast film e : acquired with unusually little effort and often by shady or dishonest methods had a keen eye for a fast buck—R. A. Keith 4 a : securely attached a rope fast to the wharf b : tenacious a fast hold on her purse 5 a archaic : sound asleep b of sleep : not easily disturbed fell into a fast sleep 6 : not fading or changing color readily fast colors 7 a : actively seeking excitement and pleasure : wild a pretty fast crowd b : sexually promiscuous 8 : resistant to change (as from destructive action or fading) fast dyes —often used in combination sunfastacid-fast bacteria fast 2 of 5 adverb 1 : in a firm or fixed manner stuck fast 2 : in a sound manner : deeply fast asleep 3 a : in a rapid manner : quickly b : in quick succession 4 : in a reckless or dissipated manner 5 : ahead of a correct time or schedule 6 archaic : close, near fast 3 of 5 verb fasted; fasting; fasts intransitive verb 1 : to abstain from food 2 : to eat sparingly or abstain from some foods fast 4 of 5 noun (1) 1 : the practice of fasting 2 : a time of fasting fast 5 of 5 noun (2) : something that fastens (such as a mooring line) or holds a fastening Synonyms Adjective blistering breakneck breathless brisk dizzy fleet fleet-footed flying galloping hasty hot lightning nippy quick rapid rapid-fire rattling snappy speedy splitting swift whirlwind zippy Adverb apace briskly chop-chop double-quick fleetly full tilt hastily hell-for-leather hot lickety-split posthaste presto pronto quick quickly rapidly snappily soon speedily swift swiftly See all Synonyms & Antonyms Example Sentences Adjective She's a very fast runner. We're off to a fast start. We're now experiencing a faster rate of inflation. We took the faster route. Adverb The boss expects this to be done this afternoon, so you'd better work fast. He ran as fast as he could. This is fast becoming a national problem. You need to act fast to take advantage of this offer. I don't know what caused the accident. It all happened so fast. She's a woman who can think fast in a crisis. He's going to have to talk fast to get himself out of this mess. The window was stuck fast. She held fast to her belief in justice. We must stand fast and not surrender! Verb She always fasts on Yom Kippur. Patients must fast for six hours before having the procedure. See More Recent Examples on the Web Verb It’s recommended that people fast for eight to 12 hours before the screening, but beyond that, there’s very little prep needed for the CVS heart health screening. —Julia Landwehr, Health, 10 Feb. 2023 Because of the need to fast, the test is usually done in the morning. —Verywell Health, 30 Jan. 2023 For starters, Mardi Gras festivities are in full swing in the Big Easy and other places around the globe the last Tuesday before Lent — the six-week period from Ash Wednesday leading up to Easter during which Christians fast, repent and pray. —Karla Pope, Good Housekeeping, 24 Jan. 2023 While your iPhone may be capped to a charge speed of 18 watts, your MacBook Pro might fast charge at 67 watts. —Hunter Fenollol, Popular Mechanics, 20 Dec. 2022 The primary intent of the Exipure weight loss pills is to fast forward your weight loss journey by maximizing the production of brown fat cells inside your body. —James Robinson, Discover Magazine, 14 Dec. 2022 First meeting between programs features running backs off to fast starts this season. —J.c. Carnahan, Orlando Sentinel, 8 Sep. 2022 Go ahead and fix yourself a fall cocktail while checking out our best fall season quotes to fast forward to autumn. —Adam Schubak, Country Living, 18 Aug. 2022 In 2019, Menna Shahin had an idea particularly inspired by Ramadan, the Muslim holiday when the devout give to poor people and fast throughout the day. —Eman Mounir, The Christian Science Monitor, 4 Aug. 2022 Noun Will a tablespoon of cream in my coffee break my fast? —Amber Smith, Discover Magazine, 30 Jan. 2023 There’s nothing much worse than spending an evening with a group of people who are about to start a diet, a punitive exercise regime, a detox or a fast. —Time, 30 Dec. 2022 Starting such a blurry fast, physically demanding sport at 55 might not have been the wisest move. —Houston Mitchell, Los Angeles Times, 6 Dec. 2022 Owens was two weeks into the fast on November 14 when Cook and Meadows, now 50 and 48 years old, stood before her again. —Roy S. Johnson \| Rjohnson@al.com, al, 5 Dec. 2022 By Wednesday, the fifth day of his fast, John was weakening. —John Rosengren, Washington Post, 30 Nov. 2022 An iftar is defined by Merriam-Webster as a meal eaten by Muslims at sundown to break the daily fast of Ramadan. —Hannah Hudnall, USA TODAY, 30 Nov. 2022 Lib also learns the reason Anna was convinced to go along with the religious fast. —Town & Country, 18 Nov. 2022 With dwindling sea ice, there is less opportunity for polar bears to fatten up in preparation for the annual fast, leaving them food-deprived for longer periods of time. —Julia Jacobo, ABC News, 10 Nov. 2022 See More Word History Etymology Adjective and Adverb Middle English, from Old English fæst; akin to Old High German festi firm, Old Norse fastr, Armenian hast Verb and Noun (1) Middle English, from Old English fæstan Noun (2) alteration of Middle English fest, from Old Norse festr rope, mooring cable, from fastr firm First Known Use Adjective before the 12th century, in the meaning defined at sense 1a Adverb before the 12th century, in the meaning defined at sense 1 Verb before the 12th century, in the meaning defined at sense 1 Noun (1) 12th century, in the meaning defined at sense 1 Noun (2) 15th century, in the meaning defined above Phrases Containing fast fast/quick buck acid-fast fast-food fast day fast/quick study fast and loose fast break fast-talk fast lane fast-twitch fast track going/getting nowhere fast hard-and-fast play fast and loose pull a fast one thick and fast fast-pitch fast and furious not so fast fast fashion fast casual fast-forward going nowhere fast See More fast/quick buck acid-fast fast-food fast day fast/quick study fast and loose fast break fast-talk fast lane fast-twitch fast track going/getting nowhere fast hard-and-fast play fast and loose pull a fast one thick and fast fast-pitch fast and furious not so fast fast fashion fast casual fast-forward going nowhere fast See More Kids Definition fast 1 of 4 adjective ˈfast 1 a : firmly fixed or bound b : tightly shut c : sticking firmly 2 : firmly loyal became fast friends 3 a : moving or able to move rapidly b : taking a short time c : giving quickness of motion (as to a thrown ball) d : favorable to speed the faster route 4 : indicating ahead of the correct time my clock is fast 5 : tricky and unfair pulled a fast one 6 : not likely to fade fast colors fast 2 of 4 adverb 1 : in a fixed manner stuck fast 2 : in a complete manner : soundly, deeply fast asleep 3 : with great speed a building fast going to ruin fast 3 of 4 verb 1 : to go without eating 2 : to eat in small amounts or only certain foods fast 4 of 4 noun 1 : the act of fasting 2 : a time of fasting Medical Definition fast 1 of 3 adjective ˈfast 1 : firmly fixed 2 a : having a rapid effect a fast medicine b : allowing for the rapid passage of a gas or liquid 3 : resistant to change (as from destructive action) —used chiefly of organisms and in combination with the agent resisted acid-fast bacteria fast 2 of 3 intransitive verb 1 : to abstain from food 2 : to eat sparingly or abstain from some foods transitive verb : to deny food to the patient is fasted and given a mild hypnotic—Lancet fast 3 of 3 noun 1 : the practice of fasting 2 : a time of fasting fasted verb past tense of fast as in dieted Synonyms & Similar Words Relevance dieted Antonyms & Near Antonyms gorged sated glutted stuffed surfeited crammed gobbled guzzled gormandized pigged out gulped See More
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fast

adjective

adverb

verb

noun (1)

noun (2)

Synonyms

Example Sentences

Word History

Phrases Containing fast

Kids Definition

Medical Definition

verb