definition of
jam

[1] #1 jam n. preserve of crushed fruit. wn

[2] #2 jam v. [throng, mob, pack, pile] press tightly together or cram; "The crowd packed the auditorium". wn

[3] #3 jam v. push down forcibly; "The driver jammed the brake pedal to the floor". wn

[4] #4 jam v. [crush] crush or bruise; "jam a toe". wn

[5] #5 jam v. [block] interfere with or prevent the reception of signals; "Jam the Voice of America"; "block the signals emitted by this station". wn