noun

 

sweet food a sweet food made from fruit that you spread on bread

a jar of strawberry jam

 

traffic a line of cars, trucks, etc that are moving slowly or not moving

We were stuck in a jam for hours.

 

verb

 

to push something somewhere firmly and tightly

She jammed her hands into her pockets.

 

stuck to get stuck or make something get stuck

The machine keeps jamming.

 

fill to fill a place completely

The streets were jammed with cars.

 

stop radio to send a signal that stops a radio being able to broadcast