Bedeutung von “jam” im Essential American English Dictionary

jam

verb us /dʒæm/ present participle jamming, past tense and past participle jammed

to push something somewhere firmly and tightly:

She jammed / her hands into her pockets.

If a machine or something that moves jams, or you jam it, it stops moving or working:

The paper keeps jamming in the machine.

to fill a place completely:

The streets were jammed with cars.

(Definition von “jam verb” aus dem Webster's Essential Mini Dictionary © Cambridge University Press)