jam1 nounjam2 verb
jamjam1 /dʒæm/ ●●● S3 noun 
EXAMPLES FROM OTHER DICTIONARIES
- a jam in the copy machine
- By the time she's cleared the jam, they're in the outskirts of Bournemouth.
- In case we don't like the cake she brings half a tea-chest of biscuits and three different jams.
- Initial press reports on the Dec. 20 accident focused on how pilot errors got the crew into a navigational jam.
- Otherwise every traffic jam will gradually vanish beneath a rising tide of its own foamy output.
- Streets around the normally tranquil town of Morton in Marsh were sealed and long traffic jams built up.
- What Case can not promise his members is immediate respite from the jams.
WORD SETS
afters, nounalmond, nounanchovy, nounapple, nounapricot, nounartichoke, nounasparagus, nounaspic, nounaubergine, nounavocado, nounbacon, nounbagel, nounbaguette, nounbaked beans, nounbanana, nounbap, nounbarley sugar, nounbatter, nounbear claw, nounbhaji, nounbiscuit, nounbisque, nounblancmange, nounbloater, nounblood orange, nounblue cheese, nounboiled sweet, nounbologna, nounbouillon, nounbread, nounbreadfruit, nounbreast, nounBrie, nounbrioche, nounbroad bean, nounbroccoli, nounbrownie, nounBrussels sprout, nounbubble and squeak, nounbullseye, nounburger, nounburrito, nounbutter, nounbutter bean, nounbutterfat, nounbutterscotch, nounCanadian bacon, nouncanapé, nouncandy apple, nouncandy cane, nouncandyfloss, nouncannelloni, nouncantaloup, nouncaramel, nouncarrot, nouncashew, nouncauliflower, nouncaviar, nouncelery, nouncereal, nouncheddar, nouncheeseburger, nouncheesecake, nounchew, nounchewing gum, nounchicken, nounchicken-fried steak, nounchilli, nounChinese leaves, nounchip, nounchipolata, nounchitterlings, nounchoc, nounchoccy, nounchoc-ice, nounchocolate, nounchocolate chip cookie, nounchop, nounchop suey, nounchowder, nounchow mein, nounChristmas cake, nounChristmas cookie, nounChristmas pudding, nounchutney, nounclementine, nouncock-a-leekie, nouncoconut, nouncod, nouncoleslaw, nouncollard greens, nouncompote, nouncoq au vin, nounCornish pasty, nouncouscous, nouncrème caramel, nouncrepe, nouncrumble, nouncurry, nounDanish, nounDanish pastry, noundessert, noundevil's food cake, noundigestive biscuit, noundill pickle, noundip, noundish, noundoorstep, noundory, noundouble cream, noundouble-decker, noundoughnut, noundressing, noundrumstick, nounduck, noundumpling, nounDundee cake, nounenchilada, nounfaggot, nounfava bean, nounfish, nounfish and chips, nounfishcake, nounfish finger, nounfish stick, nounflapjack, nounfoie gras, nounfondant, nounfondue, nounfortune cookie, nounfrankfurter, noungammon, noungarbanzo, noungâteau, noungelatin, nounghee, noungherkin, noungiblets, nounginger, adjectivegingerbread, nounginger nut, nounglacé, adjectiveglacé icing, noungoose, noungooseberry, noungoulash, noungranola, noungrape, noungrapefruit, noungravy, noungreen bean, noungreengage, noungreen onion, noungreen pepper, noungreen salad, noungriddlecake, nounguacamole, nounhaggis, nounhamburger, nounharicot, nounhash, nounhash browns, nounhazelnut, nounheavy, adjectiveheavy cream, nounhelping, nounhero, nounhock, nounhominy, nounhomogenized, adjectivehoney, nounhors d'oeuvre, nounhorseradish, nounhot-cross bun, nounhot dog, nounhotpot, nounhoumous, nounhuckleberry, nounhumbug, nounhumus, nounice, nouniceberg lettuce, nounice cream, nouningredient, nouninstant, adjectiveIrish stew, nouniron rations, nounjacket potato, nounjalapeño, nounjam, nounjambalaya, nounjawbreaker, nounJell-O, nounjelly, nounjelly baby, nounjelly bean, nounjelly roll, nounjerky, nounJerusalem artichoke, nounkabob, nounkale, nounkebab, nounkedgeree, nounkernel, nounketchup, nounkidney, nounkidney bean, nounkipper, nounkiwi fruit, nounkorma, nounkumquat, nounlamb, nounlasagne, nounleek, nounlemon, nounlemon curd, nounlemon sole, nounlentil, nounlettuce, nounlima bean, nounlime, nounlinguini, nounliquorice, nounliver, nounliver sausage, nounloaf, nounlobster, nounloganberry, nounlollipop, nounlox, nounlozenge, nounluncheon meat, nounlychee, nounmacaroni, nounmacaroon, nounmarzipan, nounmash, nounmatzo, nounmayo, nounmayonnaise, nounmeatball, nounmeatloaf, nounMelba toast, nounmelon, nounmeringue, nounmilk pudding, nounmincemeat, nounmince pie, nounminestrone, nounmixed grill, nounmonkey nut, nounmoussaka, nounmousse, nounmuesli, nounmuffin, nounmulberry, nounmullet, nounmulligatawny, nounmunchies, nounmush, nounmushy peas, nounmuskmelon, nounmussel, nounmutton, nounnachos, nounnan, nounneapolitan, adjectivenectarine, nounnonpareil, nounnoodle, nounnougat, nounoat cake, nounoatmeal, nounomelette, nounopen-faced sandwich, nounopen sandwich, nounorange, nounoven-ready, adjectiveoyster, nounpacked lunch, nounpaella, nounpancake, nounpantry, nounpapaya, nounpaprika, nounparfait, nounParmesan, nounparsley, nounparsnip, nounparson's nose, nounpassion fruit, nounpasta, nounpastrami, nounpastry, nounpasty, nounpâté, nounpatty, nounpavlova, nounpawpaw, nounpea, nounpeach, nounPeach Melba, nounpeanut, nounpeanut butter, nounpear, nounpease pudding, nounpecan, nounpemmican, nounpeppermint, nounpepperoni, nounpersimmon, nounpickle, nounpilchard, nounpineapple, nounpippin, nounpistachio, nounpitta bread, nounpizza, nounplantain, nounplum, nounplum pudding, nounpomegranate, nounpopcorn, nounpoppadom, nounPopsicle, nounpound cake, nounprofiterole, nounpudding, nounquiche, nounradish, nounragout, nounraisin, nounrasher, nounraspberry, nounravioli, nounredcurrant, nounred pepper, nounrelish, nounrice pudding, nounrisotto, nounrissole, nounroly-poly, nounsalad, nounsalsa, nounsamosa, nounsausage roll, nounsavoury, nounschnitzel, nounsemolina, nounshepherd's pie, nounsherbet, nounsoft-boiled, adjectivesole, nounsorbet, nounsoufflé, nounsoup, nounsour cream, nounsoy sauce, nounspaghetti, nounSpam, nounspare ribs, nounspeciality, nounspecialty, nounsponge, nounsubmarine sandwich, nounsuccotash, nounsucker, nounsummer pudding, nounsundae, nounsushi, nounsweet, nounsweetbread, nounsweetie, nounsweet roll, nounSwiss roll, nounSwiss steak, nounsyllabub, nountagliatelle, nounterrine, nountoad-in-the-hole, nounvol-au-vent, nounwafer, nounwaffle, nounwater biscuit, nounwater chestnut, nounwater ice, nounwatermelon, nounweenie, nounWelsh rarebit, nounwhip, nounwhipped cream, nounwhipping cream, nounYorkshire pudding, noun
COLLOCATIONS FROM THE ENTRY
Sorry we’re late. We got stuck in a traffic jam.COLLOCATIONS FROM OTHER ENTRIES Hundreds of callers jammed the switchboard trying to win the tickets (=there were too many calls for the switchboard to deal with). We were stuck in a traffic jam for two hours.COLLOCATIONS FROM THE CORPUSNOUN
Sorry we’re late. We got stuck in a traffic jam. (=use them suddenly and with a lot of force)· The car in front stopped suddenly and I had to slam on the brakes.
Hundreds of callers jammed the switchboard trying to win the tickets (=there were too many calls for the switchboard to deal with). (=a line of cars that have stopped, or are moving very slowly)· She spent two hours sitting in a traffic jam.
We were stuck in a traffic jam for two hours.· Heat the apricot jam gently and brush over the cake.· You combine yogurt with some mustard and some apricot jam.· Breakfast had been fruit and coffee; she'd firmly resisted the croissants with butter and apricot jam.· Brush cake with strained apricot jam and place marzipan on top.· Press the apricot jam through a sieve and stir in one tablespoon of cold water.· A sort of sponge, low and crusty and golden, which they ate with apricot jam.
· A jam jar on top of the bottle seems to be the answer.· Long gone are the days of the cane, worm and jam jar!· Put the oil and vinegar in a jam jar or other salted container.· Here's flowers in a jam jar.· Crystals Fill two jam jars with water and stir five tablespoons of Epsom Salts into each jar.· She felt as though her brain were clambering around her skull like a wasp trying to get out of a jam jar.· She hoped that he would not find the jam jar too utilitarian, but he appeared to possess few vases.· We could draw off a pint to fill a customer's empty jam jar.
· The fingers of her other hand stretched and pressed, but the log jam was centred just out of reach.· The contrasurvival engram is to the dynamics like a log jam which dams a necessary river.· Upriver came a rumble and boom like the dynamite explosions that broke up the log jams.
· These include making wooden seeds for raspberry jam.· Most volcanic rocks contain some phenocrysts - they are a bit like the pips in raspberry jam.· Still maintaining the shape, sandwich all the pieces of cake together with some of the buttercream and raspberry jam.· With a spoon, she scoured the crumbs from a used jar of raspberry jam.· She'd bought a pot of raspberry jam that had turned out to be bad.
· Loved peanut butter and jam sandwiches.· He munched his jam sandwich and, between bites, belched.· The Marmite and plum jam sandwiches were already curling on the trestle table under the walnut tree.
· Then on Sunday night all styles will merge in a monumental jam session.· The action continues through Sunday with nightly jam sessions, raffles, and a Grande Finale Concert.· Baker was first heard no record in a public jam session of 1941 and quickly established an unbeatable reputation in London clubs.
· At home she would have been having buttered toast and strawberry jam and probably a piece of sponge-cake to round it off.· Since when do we put corn in strawberry jam?· The strawberry jam she'd made hadn't set, she couldn't even take a telephone message.· The son was looking directly ahead out of the window stuffing himself with bread and peanut butter and strawberry jam.· Layer together with whipped cream, strawberry jam and sliced fresh strawberries.· Home-made strawberry jam is particularly delicious but there are plenty of recipes around which centre on this scrummy fruit.· On a smaller plate set before Frankie was a sandwich made with thickly sliced bread, best butter and strawberry jam.
· Harriet played in tennis doubles and her public school boyfriends crowded in to eat her jam tarts.· Members dressed up as the characters from Alice in Wonderland and had jam tarts and sandwiches in the refreshments on offer.
· Otherwise every traffic jam will gradually vanish beneath a rising tide of its own foamy output.· Look, Chief, you want to cause a traffic jam?· We don't want bus lanes on motorways and we don't want traffic jams.· Nevertheless, telecommuting is destined to increase, he said, pushed along by snowstorms, traffic jams and technological progress.· By the time we reached the Red Fort we had hit a traffic jam.· Just look at these cabins, and you forget traffic jams, mortgages and mayhem back home.· She had got stuck getting out of Belfast, and got lost trying to take a short cut round the traffic jam.· Did anyone really do themselves any good by telling somebody off on the telephone or getting angry in a traffic jam?
VERB· The council says the shift will improve safety, as the present system causes traffic jams and poor visibility.· Look, Chief, you want to cause a traffic jam?· Its fleet of 3,500 lorries could cause a 30-mile traffic jam.
· Rhubarb is perfect with rich meats and makes superb jams, jellies, puddings and pies.· A friend from a faraway city was visiting, and she decided to make jam.· It is extremely simple to make - just warmed jam with a little water.· And then she made mulberry jam.· The first bite I take makes all the jam squirt out the side over my chin.· So, for example, a preservative may be used in fruit which is used to make jam.
· Trim the edges and spread over the jam.· Serves 6 1 Spread the sponge with jam and cut into chunks.· If she has toast she spreads it with jam or marmalade.· There were scones that had been spread with butter and jam, spam sandwiches, marmalade sandwiches and egg sandwiches.· Set aside one cake for the top and thinly spread the rest with jam.
PHRASES FROM THE ENTRY► kick out the jamsPHRASES FROM OTHER ENTRIES
1- Jam yesterday, jam tomorrow but never jam today.
- If not culture jam today, then certainly culture jam tomorrow.
- Not for him the promise of jam tomorrow or a brave, new world waiting just around the next bank overdraft.
- Will it really be no jams tomorrow?
- Add a little cream puff goodie for dessert and no one will be late for dinner.
- He was courteous, but he did not feed him cream puffs.
- Makes about 19 cream puffs.
food [countable, uncountable] a thick sweet substance made from boiled fruit and sugar, eaten especially on bread: strawberry jam a jam sandwich jam jars2cars/people [countable] a situation in which it is difficult or impossible to move because there are so many cars or people: Sorry we’re late. We got stuck in a traffic jam.3machine [countable] a situation in which a machine does not work because something is stopping a part from moving: It caused a jam in the printer.4difficult situation [countable usually singular] informal a difficult situation(be/get) in/out of/into a jam We became friends after he helped me out of a jam.5music [countable] a)a jam session b)a song or piece of music, especially one by a rap or rock group6kick out the jams American English informal to play rock music loudly and with a lot of energy or emotion: Make no mistake – these guys know how to kick out the jams.7jam tomorrow British English informal good things someone promises you, which never happen: There is an element of ‘jam tomorrow’ about some of the government’s policies.jam1 nounjam2 verb
jamjam2 ●●○ verb (past tense and past participle jammed, present participle jamming) WORD ORIGINjam2
Origin:
1700-1800 Perhaps copying the actionVERB TABLE
jam
| Simple Form | ||
| Present | I, you, we, they | jam |
| he, she, it | jams | |
| Past | I, you, he, she, it, we, they | jammed |
| Present perfect | I, you, we, they | have jammed |
| he, she, it | has jammed | |
| Past perfect | I, you, he, she, it, we, they | had jammed |
| Future | I, you, he, she, it, we, they | will jam |
| Future perfect | I, you, he, she, it, we, they | will have jammed |
| Continuous Form | ||
| Present | I | am jamming |
| he, she, it | is jamming | |
| you, we, they | are jamming | |
| Past | I, he, she, it | was jamming |
| you, we, they | were jamming | |
| Present perfect | I, you, we, they | have been jamming |
| he, she, it | has been jamming | |
| Past perfect | I, you, he, she, it, we, they | had been jamming |
| Future | I, you, he, she, it, we, they | will be jamming |
| Future perfect | I, you, he, she, it, we, they | will have been jamming |
EXAMPLES FROM OTHER DICTIONARIES
- All-night jam sessions were common in Kansas City jazz clubs of the 1930s.
- All five boys jammed happily into the back seat.
- Crowds of supporters jammed the lobby.
- Just hold the door open while I jam a wedge under it.
- Kelly poured himself another glass of wine and jammed the cork back into the bottle.
- Matthews used to jam with drummer Carter Beauford and saxophonist LeRoi Moore.
- One pilot reported that his controls had jammed.
- Some guys are getting together tonight at Scott's to jam.
- The electronic equipment jams enemy radar signals.
- We were jamming with J.D. and Rich last night.
- Bollards are prone to sudden collapse, and the ropes often jam in the groove behind the capstan during retrieval.
- In his desperation to escape, he fumbled the lever and the door jammed partly open.
- Mark jams his under a cushion.
- Of course, the newspapers were filled with it, and the docks, railyards, and whorehouses were jammed with soldiers.
- The result was the Yosemite that tourists see today, jammed with awe-inspiring plutons with rounded tops and steep, vertical sides.
- The third time the clasp jammed.
Longman Language Activatorto make something full
to put enough of something into a container to make it full: · Mix the spinach and cheese and use it to fill the pasta shells.fill something with something: · We stood at the counter, filling our bowls with salad.· He had a notebook that he had filled with stories and poems.
to fill a container that already has a small amount of something in it: · The waiter filled up everyone's glasses.fill something up with something: · If the oil tank is less than half full, tell them to fill it up.fill up something with something: · I filled up the sandbox with some more sand.
to quickly fill something such as a bag or pocket by pushing things into it tightly: stuff something into something: · She hurriedly stuffed some things into an overnight bag and left.stuff something with something: · We had to stuff envelopes with letters and information packs.
to push too many things into a container or space, so that they are all pressed together: cram/jam something into something: · I crammed all my clothes into the suitcase and called a taxi.· Too many houses are crammed into too small an area.· Fifty-five children were jammed into a classroom designed to hold thirty.
also load up to fill a vehicle with goods, furniture etc: · Loading the van was hard work.· This giant machine can load up a 10-ton truck every few minutes.load something into something: · A woman was loading groceries into her car.load something with something: · Two men were loading up a truck with boxes of melons.
to play music to make music on a musical instrument: · Do you play in an orchestra?· Charles likes to play Celtic music on his flute.play the piano/trumpet/drums etc: · I didn't know you could play the violin.
formal to sing or play music in front of people who have come to listen: · She still gets very nervous about performing in public.· The orchestra will be at the Festival Hall tonight, performing a selection of works by Russian composers.
playing a particular instrument in a band: · When they perform, Barbara sings and her older sister Suzie is on drums.· The recording features Norman Simmons on piano and Henry Johnson on guitar.
to perform music by creating it from your imagination while you play or sing: · You can't play jazz unless you can improvise.· Mike improvised a little farewell song at the end of the evening.
to play jazz or rock music with other people in an informal way, without planning what you are going to play: · Some guys are getting together tonight at Scott's to jam.jam with: · Matthews used to jam with drummer Carter Beauford and saxophonist LeRoi Moore.jam session (=an occasion when a group of musicians jam): · All-night jam sessions were common in Kansas City jazz clubs of the 1930s.
to play a song or piece of music from memory without reading the written music: · He never took piano lessons - he just plays by ear.· With the Suzuki method, a child is trained to play by ear at an early age without any written music.
to push an object into an opening or into something soft to push a sharp object into something soft, or push something into a small space: stick something into/up/inside etc something: · They stuck pins into a map to show where the enemy's camps were.· The doctor had to stick a tube down my throat in order to examine my stomach.
to push something into a small space using a lot of strength: force something into/through/down something: · She tried to force her feet into the shoes but they were too small.· I finally managed to force the package through the small letterbox.
informal to push something quickly and carelessly into a small space: shove/stuff something into/up/down etc: · She shoved two more sweaters into her bag.· He quickly stuffed the letter down the side of the sofa.
to push something very hard or violently into something: ram something into something: · She rammed the papers into her briefcase.· Construction workers had to spend the night ramming iron girders into place to support the building.
to push something deep inside another thing, especially violently or suddenly: plunge something into something: · Plunging both hands deep into the sack she rummaged among the parcels.· Then he plunged the knife into his victim's chest.
to push something suddenly and hard into an opening or into something soft: thrust something into something: · He thrust the knife deep into the animal's chest.· Thrusting the gun back into its holster, the man grinned at the body lying on the floor.· He thrust some money into my hand and told me to drive him to the airport.
to push something with difficulty into a space that is too small: squeeze something into something: · I don't think I can squeeze any more files into this drawer.· It's no use trying to squeeze yourself into clothes that are too small for you.
to push something forcefully into a small space, so that it fits tightly and is difficult to pull out again: jam something under/into etc something: · Just hold the door open while I jam a wedge under it.· Kelly poured himself another glass of wine and jammed the cork back into the bottle.
WORD SETSaerial, nounairtime, nounAM, nounantenna, nounatmospherics, nounaudio, adjectiveband, nounBBC, the, beacon, nounbeam, verbBeeb, the, bleep, verbboom, nounboom box, nounBritish Broadcasting Corporation, nounbroadband, nounbroadcast, nounbroadcast, verbcable television, CB, nounCCTV, nounCeefax, nounchannel, nounclosed circuit television, nouncommunications satellite, nouncontrast, noundial, nounDJ, nounexposure, nounflash, verbFM, nounfrequency, nounham, nounHz, interference, nounjam, verbkHz, kilohertz, nounlinkup, nounlive, adjectivelocal radio, nounlong wave, nounloudspeaker, nounLW, mast, nounmedium wave, nounmegahertz, nounMHz, modulate, verbmonitor, nounmono, nounmono, adjectiveNBC, nounnetwork, nounnetwork, verbon-air, adjectiveover, prepositionpresenter, nounprogramming, nounquadraphonic, adjectiveradio, nounradio, verbreceive, verbreceiver, nounreception, nounrepeat, verbrepeat, nounrerun, nounrerun, verbroger, interjectionsatellite, nounsatellite dish, nounsatellite television, nounsaturation, nounscrambler, nounseries, nounset, nounshipping forecast, nounship-to-shore, adjectiveshort wave, nounsignal, nounsignature tune, nounsimulcast, verbSOS, nounsound, nounsound bite, nounsound check, nounstatic, nountelecast, nounTeletext, nountelevise, verbtelevision, nountelevision licence, nountelly, nountime signal, nountrack, verbtransistor, nountransistor radio, nountransmission, nountransmit, verbtransmitter, nountune, verbtuner, nountweeter, nountwo-way, adjectiveUHF, noununscramble, verbveejay, nounvideo, nounvideo, adjectivevideo jockey, nounvolume, nounwaveband, nounwavelength, nounwhite noise, nounwireless, noun
COLLOCATIONS FROM OTHER ENTRIES Hundreds of callers jammed the switchboard trying to win the tickets (=there were too many calls for the switchboard to deal with). We were stuck in a traffic jam for two hours.COLLOCATIONS FROM THE CORPUSADVERB
(=use them suddenly and with a lot of force)· The car in front stopped suddenly and I had to slam on the brakes.
Hundreds of callers jammed the switchboard trying to win the tickets (=there were too many calls for the switchboard to deal with). (=a line of cars that have stopped, or are moving very slowly)· She spent two hours sitting in a traffic jam.
We were stuck in a traffic jam for two hours.· Anything that would grab the eye was jammed together to make the page frantically busy.· The towers were jammed together so tightly, he could feel the mass and stupendous weight.· Despair overtakes me as soon as I see the dreaded trolleys jammed together.· Locked side by side we squeezed fiercely, our sweaty temples jammed together, each trying to crush the other into submission.· Boys were jammed together like rush-hour travellers on the Underground.· Belowdecks, the crew was jammed together, 150 men to each open, windowless, poorly lighted, ill-ventilated bay.· Their genes are jammed together and even overlap, with the end of one marking the start of the next.· Connors and Banjo sat jammed together on the bench beside me.
· The ball-hitch mechanism seemed to have gone rusty and jammed up since it was last used.· He was jammed up against something; there was something stuck in his craw.· The drum was floating, jammed up against the Lock, thumping into the gates with each surge of the tide.· Whenever he found himself praying, he knew he was at the very least jammed up inside, probably crazy.
NOUN· Most people naively imagine they will stop immediately when they jam on the brakes.· When he jammed the brakes on she was better balanced.· He jammed his brakes, and stopped his circling feet.
· Opening the executive case, he extracted a rubber wedge, jammed it under the door.· The Whitsun visitors would follow the Easter ones; in no time at all the hotels would be jammed to the doors.· Wegner said one possibility is that the impact jammed the door.· Maybe then, just for an instant, she gave an irritated glance back at the jammed door.
· Residents jammed the switchboard of city authorities asking whether it was safe in the area.· Viewers jammed the Thames Television switchboard.
PHRASES FROM THE ENTRY► somebody is jammingPHRASES FROM OTHER ENTRIES
1push hard [transitive always + adverb/preposition] to push something somewhere using a lot of force, until it can move no further: - Most people naively imagine they will stop immediately when they jam on the brakes.
- But look at the text, calls jammed our switchboard all day.
- Residents jammed the switchboard of city authorities asking whether it was safe in the area.
- Add a little cream puff goodie for dessert and no one will be late for dinner.
- He was courteous, but he did not feed him cream puffs.
- Makes about 19 cream puffs.
He jammed his foot on the accelerator and the car sped off. A chair had been jammed up against the door.2machine [intransitive, transitive] (also jam up) if a moving part of something jams, or if you jam it, it no longer works properly because something is preventing it from moving: The front roller has jammed on the photocopier.3block [intransitive, transitive] (also jam up) if a lot of people or vehicles jam a place, they fill it so that it is difficult to move SYN cram: Crowds jammed the entrance to the stadium.jam into They all jammed into the car. → jammed(2)4music [intransitive] (also jam out) to play music in an informal way with other people → jam session5jam on the brakes to slow down a car suddenly by putting your foot down hard on the brake6jam somebody’s/the switchboard if telephone calls jam the switchboard of an organization, so many people are phoning the organization that it cannot deal with them all: Viewers jammed the switchboard with complaints.7radio [transitive] to deliberately prevent broadcasts or other electronic signals from being received, by broadcasting signals on the same wavelength8somebody is jamming American English spoken used to say that someone is doing something very quickly or welljam out phrasal verb to dance to music