Jam

Definition of Jam

Pronunciation: jămd
n.1.A kind of frock for children.
1.(Mining) See Jamb.
v. t.1.
[imp. & p. p. Jammed (jămd); p. pr. & vb. n. Jamming.]
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.
3.(Naut.) To bring (a vessel) so close to the wind that half her upper sails are laid aback.
4.To block or obstruct by packing too much (people or objects) into; as, shoppers jammed the aisles during the fire sale.
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.
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.
v. i.2.To become stuck so as not to function; as, the copier jammed again.
2.(Music) To play an instrument in a jam session.
3.To crowd together; - usually used with together or in; as, fifty people jammed into a conference room designed for twenty.
n.1.A mass of people or objects crowded together; also, the pressure from a crowd; a crush; as, a jam in a street; a jam of logs in a river.
2.An injury caused by jamming.
3.A difficult situation; as, he got himself into a jam.
1.A preserve of fruit boiled with sugar and water; also called jelly; as, raspberry jam; currant jam; grape jam.
Jam nut
See Check nut, under Check.
Jam weld
(Forging) a butt weld. See under Butt.

Related Words

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