Meaning : Push down forcibly.
The driver jammed the brake pedal to the floor.
Meaning : Crush or bruise.
Jam a toe.
Synonyms : crush
Meaning : Interfere with or prevent the reception of signals.
Jam the Voice of America.
Block the signals emitted by this station.
Synonyms : block
Meaning : Get stuck and immobilized.
The mechanism jammed.
Meaning : Preserve of crushed fruit.