jam

US /dʒæm/

UK /dʒæm/

A2
v.t.Transitive VerbTo block a signal (e.g. radio waves)
The criminals tried to jam the police signals
v.t./i.Verb (Transitive/Intransitive)To pack together so things cannot move freely
She had to jam the clothes into the bag to make room
n. (c./u.)Noun (Countable/Uncountable)Blockage of cars, people making movement difficult
I am sitting in a traffic jam
v.t.Transitive VerbTo push into a tight space until it can't move
The passengers jam themselves into the train
n. (c./u.)Noun (Countable/Uncountable)Difficult situation that is hard to resolve
We're in a jam because we didn't study for the tests
v.i.Intransitive VerbTo play music informally without much preparation
The musicians jam on their guitars all night
n. (c./u.)Noun (Countable/Uncountable)When a machine stops functioning because stuck
I think the machine has a jam, we should open it and fix it
v.i.Intransitive VerbTo stop functioning because something is stuck
The water pump will jam unless you clean it out
n. (c./u.)Noun (Countable/Uncountable)Sweet spread for bread made by boiling fruit
I put jam on my bread to make it sweet

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