n.
Function: noun
Date: 1805
1 a : an act or instance of jamming b : a crowded mass that impedes or blocks <a traffic jam >
2 a : the quality or state of being jammed b : the pressure or congestion of a crowd : CRUSH
3 : a difficult state of affairs : FIX <got into a jam >
4 : JAM SESSION
5 : DUNK SHOT
6 slang : a musical piece