Topic: MUSIC

Date: 1700-1800
Origin: Perhaps copying the action


2 verb
jam2 past tense and past participle jammed, present participle jamming

push hard

[transitive always + adverb/preposition] to push something somewhere using a lot of force, until it can move no further:
He jammed his foot on the accelerator and the car sped off.
A chair had been jammed up against the door.


[intransitive and transitive] also jam up if a moving part of something jams, or if you jam it, it no longer works properly because something is preventing it from moving:
The front roller has jammed on the photocopier.


[intransitive and transitive] also jam up if a lot of people or vehicles jam a place, they fill it so that it is difficult to move [= cram]:
Crowds jammed the entrance to the stadium.
jam into
They all jammed into the car.
jammed (2)


[intransitive] also jam outAPM to play music in an informal way with other people jam session

jam on the brakes

to slow down a car suddenly by putting your foot down hard on the brake

jam somebody's/the switchboard

TCT if telephone calls jam the switchboard of an organization, so many people are phoning the organization that it cannot deal with them all:
Viewers jammed the switchboard with complaints.


[transitive]TCB to deliberately prevent broadcasts or other electronic signals from being received, by broadcasting signals on the same wavelength

somebody is jamming

American English spoken used to say that someone is doing something very quickly or well

jam out

phrasal verb
to dance to music

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