From The Collaborative International Dictionary of English v.0.44 [gcide]:
Jam \Jam\, verb (used with an object) [imp. & p. p. {Jammed} (j[a^]md); p. pr. & vb. n. {Jamming}.] [Either fr. jamb, as if squeezed between jambs, or more likely from the same source as champ See {Champ}.]
1. To press into a close or tight position; to crowd; to squeeze; to wedge in; to cram; as, rock fans jammed the theater for the concert.
The ship . . . jammed in between two rocks. --De Foe.
2. To crush or bruise; as, to jam a finger in the crack of a door. [Colloq.]
3. (Naut.) To bring (a vessel) so close to the wind that half her upper sails are laid aback. --W. C. Russell.
4. To block or obstruct by packing too much (people or objects) into; as, shoppers jammed the aisles during the fire sale. [PJC]
5. (Radio) To interfere with (a radio signal) by sending other signals of the same or nearby frequency; as, the Soviets jammed Radio Free Europe broadcasts for years during the cold war. [PJC]
6. To cause to become nonfunctional by putting something in that blocks the movement of a part or parts; as, he jammed the drawer by putting in too many loose papers; he jammed the lock by trying to pick it. [PJC]
From WordNet (r) 2.0 [wn]:
From WordNet (r) 2.0 [wn]:
noun
2: informal terms for a difficult situation; "he got into a terrible fix"; "he made a muddle of his marriage" [syn: {fix}, {hole}, {mess}, {muddle}, {pickle}, {kettle of fish}]
3: a dense crowd of people [syn: {crush}, {press}]
4: deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems [syn: {jamming}, {electronic jamming}]
verb
1: press tightly together or cram; "The crowd packed the auditorium" [syn: {throng}, {mob}, {pack}, {pile}]
2: push down forcibly; "The driver jammed the brake pedal to the floor"
3: crush or bruise; "jam a toe" [syn: {crush}]
4: interfere with or prevent the reception of signals; "Jam the Voice of America"; "block the signals emitted by this station" [syn: {block}]
5: get stuck and immobilized; "the mechanism jammed"
6: crowd or pack to capacity; "the theater was jampacked" [syn: {jampack}, {ram}, {chock up}, {cram}, {wad}]
7: block passage through; "obstruct the path" [syn: {obstruct}, {obturate}, {impede}, {occlude}, {block}, {close up}] [ant: {free}] [also: {jamming}, {jammed}]
From WordNet (r) 2.0 [wn]:
noun
1: deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems [syn: {electronic jamming}, {jam}]
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