jam /dʒæm/ I.vi.&vt. (jammed, jamming) 1. 塞，挤；(使)交通阻塞，(使)卡住： He jammed four apples in his pocket. 他把四个苹果塞进他口袋。We were jammed together in the large crowd. 我们被挤进一大群人里去了。The door has jammed. 门卡住了。 2. 踩(紧)，(使动)按，夹：He jammed the bookcase against the door. 他把书柜紧靠门放  ‖II. n. 1.［c］(交通)阻塞，拥挤： We were held for an hour in traffic jam. 交通拥挤我们被堵了一个小时。 2.［u］果酱： Mother makes jam by boiling fruit and sugar together. 妈妈把水果和糖放一块煮做果酱。