jam

jam¹
(jammed, jamming)

[with obj. and adverbial]squeeze or pack (someone or something) tightly into a specified space
使…挤入，把…塞入
four of us were jammed in one compartment.
我们四个人挤在一个隔间。
people jammed their belongings into cars.
人们把自己的物品塞进汽车内。
■push (something) roughly and forcibly into position or a space
猛推
he jammed his hat on.
他把帽子使劲往头上一扣。
■[with obj.]crowd on to (a road) so as to block it
堵住，塞住
the roads were jammed with traffic.
马路上交通堵塞。
■[with obj.]cause (telephone lines) to be continuously engaged with a large number of calls
（因大量打进来的电话）使（电话线）总是占线
listeners jammed a radio station's switchboard with calls.
听众的电话把无线电台总机打爆了。
■[no obj., with adverbial of direction]push or crowd into an area or space
挤入，涌入
75,000 refugees jammed into a stadium today to denounce the accord.
今天75,000名难民涌入体育场谴责该条约。
become or make unable to move or work due to a part seizing or becoming stuck
卡住，轧住，（使）不能动弹
[no obj.]the photocopier jammed.
复印机卡住了。
[with obj.]the doors were jammed open.
门被卡住关不上了。
■[with obj.]make (a radio transmission) unintelligible by causing interference
干扰（无线电广播）
[no obj.](informal)improvise with other musicians, especially in jazz or blues
(非正式)与别的乐手一起即兴表演（尤指爵士乐或蓝调）
the opportunity to jam with Atlanta blues musicians.
与亚特兰大蓝调乐手一起即兴表演的机会。

noun

an instance of a machine or thing seizing or becoming stuck
（机器或其他物件）卡住，轧住，不能动弹
paper jams.
卡纸。
■(informal)an awkward situation or predicament
(非正式)窘境；困境
I'm in a jam.
我左右为难。
■short for traffic jam
traffic jam 的简称
■[often with modifier](Climbing)a handhold obtained by stuffing a part of the body such as a hand or foot into a crack in the rock
(登山)可以抓牢的东西，着力点（如把手或脚插入岩缝）
(亦作 jam session)an informal gathering of musicians improvising together, especially in jazz or blues
爵士乐（或蓝调）乐手的非正式即兴演奏

常用词组
jam on the brakes

operate the brakes of a vehicle suddenly and forcibly, typically in response to an emergency
紧急刹车

派生
jammer
noun
语源

early 18th cent.: probably symbolic; compare with jag and cram

jam²
noun

[mass noun](chiefly Brit.)a sweet spread or conserve made from fruit and sugar boiled to a thick consistency
(主英)果酱
■(Brit.)used in reference to something easy or pleasant
(英)轻松愉快的事
they want it all, both ways and with jam on the top.
他们什么都想要，既要两全其美又要毫不费力。

(jammed, jamming)

[with obj.]make (fruit) into jam
把（水果）做成果酱

常用词组
jam tomorrow

(Brit.)a pleasant thing which is often promised but rarely materializes
(英)允诺而做不到的好事；可望而不可即的事物
a promise of jam tomorrow wasn't enough to satisfy them.
口惠而实不至的诺言难以令他们满意。

语源

mid 18th cent.: perhaps from jam

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