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jam

noun
 
🔊/dʒæm/
🔊/dʒæm/
Idioms
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    sweet food甜食

  1.  
     [uncountable, countable] a thick sweet substance made by boiling fruit with sugar, often sold in jars and spread on bread果酱
    • strawberry jam草莓酱
    • a jar/pot of jam一罐果酱
    • recipes for jams and preserves果酱和蜜饯的制作方法
    • (British English) a jam doughnut果酱炸面圈
    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人多；车多

  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拥挤；堵塞
    • The bus was delayed in a five-mile jam.公共汽车因长达五英里的交通堵塞而延误。🔊🔊
    • As fans rushed to leave, jams formed at all the exits.因球迷都急于离开，所有出口都给阻塞了。🔊🔊
    • We were stuck in a jam for an hour.我们被困在一个小时内。
    see also traffic jamTopics Transport by car or lorryb2

    3. machine机器

  3. [countable] a situation in which a machine does not work because something is stuck in one position卡住（因而发生故障）
    • There's a paper jam in the photocopier.复印机卡纸了。🔊🔊
    Topics Engineeringc2

    4. people人

  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.JAM可能正在工作，但正在努力支付诸如食物，暖气或租金之类的必需品。
    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陷入困境
jam tomorrow
  1. (British English, informal) good things that are promised for the future but never happen可望而不可即的美好未来；许而不予的好东西
    • They refused to settle for a promise of jam tomorrow.他们并不满足于那些美好未来的空话。🔊🔊
money for jam/old rope
  1. (British English, informal) money that is earned very easily, for something that needs little effort容易赚的钱财
    • The job only took about an hour—it was money for jam.这项工作只花了一个小时左右-那是果酱的钱。

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用力推

  1. [transitive] jam something + adv./prep. to push something somewhere with a lot of force使劲（往某处）挤（或压、塞）
    • He jammed his fingers in his ears.他用手指使劲堵住耳朵。🔊🔊
    • A stool had been jammed against the door.门被一把凳子顶住了。🔊🔊
    2.

    stop moving/working停止移动／运转

  2. [intransitive, transitive] to become unable to move or work; to make something do this（使）卡住，不能动弹，不能运转
    • jam (up) The photocopier keeps jamming up.这台复印机总是卡纸。🔊🔊
    • jam something (up) There's a loose part that keeps jamming the mechanism.有个零件松了经常卡住机器。🔊🔊
    • + adj. The valve has jammed shut.阀门给卡住了打不开。🔊🔊
    • jam something + adj. He jammed the door open with a piece of wood.他用一块木头卡住门让它开着。🔊🔊
    • The traffic was jammed solid in the city centre.市中心堵得水泄不通。
    Topics Engineeringc2

    3. put into small space塞进

  3. [transitive, usually passive, intransitive] to put somebody/something into a small space where there is very little room to move塞入；塞进；挤进 synonym squash, squeeze
    • be jammed + adv./prep. Six of us were jammed into one small car.我们六个人被塞进一辆小汽车里。🔊🔊
    • We were jammed together like sardines in a can.我们像罐头里的沙丁鱼一般紧紧挤在一起。🔊🔊
    • The cupboards were jammed full of old newspapers.橱柜里塞满了旧报纸。🔊🔊
    • + adv./prep. Nearly 1 000 students jammed into the hall.近 1 000 名学生挤到礼堂里。🔊🔊
    see also jam-packed
    Extra Examples
    • The room is jammed tight with furniture.房间里堆满了家具。
    • The airport was jammed with people trying to arrange flights.机场挤满了要搭乘航班的旅客。
    • The streets were completely jammed with traffic.街道完全被交通堵塞了。
    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挤满人／物

  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挤满；塞紧 synonym block
    • Viewers jammed the switchboard with complaints.打电话投诉的观众使总机应接不暇。🔊🔊
    • The traffic will just jam up our village.车辆将会把我们村子堵得水泄不通。
    • People constantly jammed the street.街上经常挤满了人。
    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无线电广播

  5. [transitive] jam something (specialist) to send out radio signals to prevent another radio broadcast from being heard（发射无线电波）干扰Topics TV, radio and newsc2

    6. play music演奏音乐

  6. [intransitive, transitive] jam (something) to play music with other musicians in an informal way without preparing or practising first即兴演奏Topics 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猛踩刹车
    • The car skidded as he jammed on the brakes.他紧急刹车时汽车向前滑了一段路。🔊🔊