jam

(noun) preserve of crushed fruit.

(noun) informal terms for a difficult situation. Synonyms: fix, hole, mess, muddle, pickle, kettle of fish. Examples: "He got into a terrible fix." "He made a muddle of his marriage."

(noun) a dense crowd of people. Synonyms: crush, press.

(noun) deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems. Synonyms: jamming, electronic jamming.

(verb) press tightly together or cram. Synonyms: throng, mob, pack, pile. Examples: "The crowd packed the auditorium."

(verb) push down forcibly. Examples: "The driver jammed the brake pedal to the floor."

(verb) crush or bruise. Synonyms: crush. Examples: "Jam a toe."

(verb) interfere with or prevent the reception of signals. Synonyms: block. Examples: "Jam the voice of america." "Block the signals emitted by this station."

(verb) get stuck and immobilized. Examples: "The mechanism jammed."

(verb) crowd or pack to capacity. Synonyms: jampack, ram, chock up, cram, wad. Examples: "The theater was jampacked."

(verb) block passage through. Synonyms: obstruct, obturate, impede, occlude, block, close up. Examples: "Obstruct the path."