from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To drive or wedge forcibly into a tight position: jammed the cork in the bottle.
- transitive v. To activate or apply (a brake) suddenly. Often used with on: jammed the brakes on.
- transitive v. To cause (moving parts, for example) to lock into an unworkable position: jammed the typewriter keys.
- transitive v. To pack (items, for example) to excess; cram: jammed my clothes into the suitcase.
- transitive v. To fill (a container or space) to overflowing: I jammed the suitcase with clothes. Fans jammed the hallway after the concert.
- transitive v. To block, congest, or clog: a drain that was jammed by debris.
- transitive v. To crush or bruise: jam a finger.
- transitive v. Electronics To interfere with or prevent the clear reception of (broadcast signals) by electronic means.
- transitive v. Baseball To throw an inside pitch to (a batter), especially to prevent the batter from hitting the ball with the thicker part of the bat.
- intransitive v. To become wedged or stuck.
- intransitive v. To become inoperable: The computer keyboard jammed.
- intransitive v. To force one's way into or through a limited space.
- intransitive v. Music To participate in a jam session.
- intransitive v. Basketball To make a dunk shot.
- n. The act of jamming or the condition of being jammed.
- n. A crush or congestion of people or things in a limited space: a traffic jam.
- n. A trying situation. See Synonyms at predicament.
- n. A preserve made from whole fruit boiled to a pulp with sugar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sweet mixture of fruit boiled with sugar and allowed to congeal. Often spread on bread or toast or used in jam tarts.
- n. A difficult situation.
- n. Blockage, congestion.
- n. (popular music) An informal, impromptu performance or rehearsal.
- n. (baseball) A difficult situation for a pitcher or defending team.
- n. (basketball) A forceful dunk.
- n. (roller derby) A play during which points can be scored.
- n. Any of several rock-climbing maneuvers requiring wedging of an extremity into a tight space.
- n. luck.
- v. To get something stuck in a confined space.
- v. To brusquely force something into a space; cram, squeeze.
- v. To cause congestion or blockage. Often used with "up"
- v. To block or confuse a broadcast signal.
- v. To throw a pitch at or near the batter's hands.
- v. To play music (especially improvisation as a group.)
- v. To injure a finger or toe by sudden compression of the digit's tip.
- v. To attempt to score points.
from the GNU version of the Collaborative International Dictionary of English
- n. A kind of frock for children.
- n. See jamb.
- transitive v. To press into a close or tight position; to crowd; to squeeze; to wedge in; to cram.
- transitive v. To crush or bruise.
- transitive v. To bring (a vessel) so close to the wind that half her upper sails are laid aback.
- transitive v. To block or obstruct by packing too much (people or objects) into.
- transitive v. To interfere with (a radio signal) by sending other signals of the same or nearby frequency.
- transitive v. To cause to become nonfunctional by putting something in that blocks the movement of a part or parts.
- intransitive v. To become stuck so as not to function.
- intransitive v. To play an instrument in a jam session.
- intransitive v. To crowd together; -- usually used with together or in.
- n. A mass of people or objects crowded together; also, the pressure from a crowd; a crush
- n. An injury caused by jamming.
- n. A difficult situation.
- n. A preserve of fruit boiled with sugar and water; also called jelly
from The Century Dictionary and Cyclopedia
- To press; squeeze; thrust or press down or in with force or violence; thrust or squeeze in so as to stick fast; press or crowd in such a manner as to prevent motion or hinder extrication.
- To fill full; block up; prevent the movement of by pressure, crowding, etc.
- To tread hard or make firm by treading, as land is trodden hard by cattle.
- To become wedged together or in place, as by violent impact; stick fast: as, the door jams.
- n. A crush; a squeeze; pressure by thrusting or crowding.
- n. A crowd of objects irregularly and tightly pressed together by arrest of their movement; a block, as of people, vehicles, or floating logs.
- n. A conserve of fruits prepared by boiling them to a pulp in water with sugar.
- n. Another spelling of jamb, 4.
- To push (a bill or measure) through the regular routine of a legislative body by the brute force of a majority controlled by ‘the machine,’ without proper consideration or discussion. [Political slang.]
- n. An extra pool in the game of napoleon.
- To smear or spread with jam: as, a slice of bread thickly jammed.
- To become jam; thicken to the consistency of jam.
- n. The title of certain native chiefs in northwestern India.
- n. In England, a kind of dress worn by children: so called from the Hindu jama, a long muslin gown worn in India by both Mohammedans and Hindus.
- n. An abbreviation of Jamaica.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. crush or bruise
- v. crowd or pack to capacity
- n. informal terms for a difficult situation
- n. deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
- v. press tightly together or cram
- v. get stuck and immobilized
- n. a dense crowd of people
- v. push down forcibly
- v. interfere with or prevent the reception of signals
- v. block passage through
- n. preserve of crushed fruit
Possibly from jam1.(American Heritage® Dictionary of the English Language, Fourth Edition)