jam 1 S3 / dʒæm / 名词

1 food [可数和不可数名词] a thick sweet substance made from boiled fruit and sugar, eaten especially on bread → jelly :

strawberry jam

a jam sandwich

jam jars

2 cars/people [可数名词] 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 .

3 machine [可数名词] a situation in which a machine does not work because something is stopping a part from moving :

It caused a jam in the printer.

4 difficult situation [可数名词，通常单数] informal a difficult situation

(be/get) in/out of/into a jam

We became friends after he helped me out of a jam.

5 music [可数名词]

a) a jam session

b) a song or piece of music, especially one by a rap or rock group

6 kick 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.

7 jam 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.