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单词 jam
释义

jam

noun
 
/dʒæm/
/dʒæm/
Idioms
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    sweet food

  1.  
     [uncountable, countable] a thick sweet substance made by boiling fruit with sugar, often sold in jars and spread on bread
    • strawberry jam
    • a jar/pot of jam
    • recipes for jams and preserves
    • (British English) a jam doughnut
    compare jelly, marmaladeTopics Fooda2
    Oxford Collocations Dictionaryadjective
    • home-made
    • apricot
    • raspberry
    • …
    … of jam
    • dollop
    • jar
    • pot
    • …
    verb + jam
    • make
    • spread (something with)
    jam + noun
    • jar
    • doughnut
    • sandwich
    • …
    phrases
    • bread and jam
    See full entry
    2.

    many people/vehicles

  2. [countable] a situation in which it is difficult or impossible to move because there are so many people or vehicles in one particular place
    • The bus was delayed in a five-mile jam.
    • As fans rushed to leave, jams formed at all the exits.
    • We were stuck in a jam for an hour.
    see also traffic jamTopics Transport by car or lorryb2

    3. machine

  3. [countable] a situation in which a machine does not work because something is stuck in one position
    • There's a paper jam in the photocopier.
    Topics Engineeringc2

    4. people

  4. JAM, Jam
     (in the UK) used by the media to describe people who do not have much money to live on (the abbreviation for
    just about managing
    )
    • JAMs may be in work, but are struggling to pay for essentials such as food, heating or rent.
    5. Word Originnoun senses 2 to 3 early 18th cent.: probably symbolic; compare with cram noun sense 1 mid 18th cent.: perhaps from jam (verb).
Idioms
be in a jam
  1. (informal) to be in a difficult situation
jam tomorrow
  1. (British English, informal) good things that are promised for the future but never happen
    • They refused to settle for a promise of jam tomorrow.
money for jam/old rope
  1. (British English, informal) money that is earned very easily, for something that needs little effort
    • The job only took about an hour—it was money for jam.

jam

verb
/dʒæm/
/dʒæm/
Verb Forms
present simple I / you / we / they jam
/dʒæm/
/dʒæm/
he / she / it jams
/dʒæmz/
/dʒæmz/
past simple jammed
/dʒæmd/
/dʒæmd/
past participle jammed
/dʒæmd/
/dʒæmd/
-ing form jamming
/ˈdʒæmɪŋ/
/ˈdʒæmɪŋ/
Idioms
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    push with force

  1. [transitive] jam something + adv./prep. to push something somewhere with a lot of force
    • He jammed his fingers in his ears.
    • A stool had been jammed against the door.
    2.

    stop moving/working

  2. [intransitive, transitive] to become unable to move or work; to make something do this
    • jam (up) The photocopier keeps jamming up.
    • jam something (up) There's a loose part that keeps jamming the mechanism.
    • + adj. The valve has jammed shut.
    • jam something + adj. He jammed the door open with a piece of wood.
    • The traffic was jammed solid in the city centre.
    Topics Engineeringc2

    3. put into small space

  3. [transitive, usually passive, intransitive] to put somebody/something into a small space where there is very little room to move synonym squash, squeeze
    • be jammed + adv./prep. Six of us were jammed into one small car.
    • We were jammed together like sardines in a can.
    • The cupboards were jammed full of old newspapers.
    • + adv./prep. Nearly 1 000 students jammed into the hall.
    see also jam-packed
    Extra Examples
    • The room is jammed tight with furniture.
    • The airport was jammed with people trying to arrange flights.
    • The streets were completely jammed with traffic.
    Oxford Collocations Dictionaryadverb
    • constantly
    • up
    phrases
    • be jammed full (of something)
    • be jammed solid
    • be jammed tight with something
    • …
    See full entry
    4.

    fill with people/things

  4. [transitive] jam something (up) (with somebody/something) to fill something with a large number of people or things so that it is unable to function as it should synonym block
    • Viewers jammed the switchboard with complaints.
    • The traffic will just jam up our village.
    • People constantly jammed the street.
    Oxford Collocations Dictionaryadverb
    • constantly
    • up
    phrases
    • be jammed full (of something)
    • be jammed solid
    • be jammed tight with something
    • …
    See full entry
    5.

    radio broadcast

  5. [transitive] jam something (specialist) to send out radio signals to prevent another radio broadcast from being heardTopics TV, radio and newsc2

    6. play music

  6. [intransitive, transitive] jam (something) to play music with other musicians in an informal way without preparing or practising firstTopics Musicc2
    7. Word Originverb early 18th cent.: probably symbolic; compare with cram.
Idioms
jam on the brake(s) | jam the brake(s) on
  1. to operate the brakes on a vehicle suddenly and with force
    • The car skidded as he jammed on the brakes.
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更新时间：2024/12/23 20:25:59