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jam

 - 10 dictionary results
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jam

1  [jam] verb, jammed, jam⋅ming, noun
Use jam in a Sentence
–verb (used with object)
1. to press, squeeze, or wedge tightly between bodies or surfaces, so that motion or extrication is made difficult or impossible: The ship was jammed between two rocks.
2. to bruise or crush by squeezing: She jammed her hand in the door.
3. to fill too tightly; cram: He jammed the suitcase with clothing.
4. to press, push, or thrust violently, as into a confined space or against some object: She jammed her foot on the brake.
5. to fill or block up by crowding; pack or obstruct: Crowds jammed the doors.
6. to put or place in position with a violent gesture (often fol. by on): He jammed his hat on and stalked out of the room.
7. to make (something) unworkable by causing parts to become stuck, blocked, caught, displaced, etc.: to jam a lock.
8. Radio.
a. to interfere with (radio signals or the like) by sending out other signals of approximately the same frequency.
b. (of radio signals or the like) to interfere with (other signals).
9. to play (a piece) in a freely improvised, swinging way; jazz up: to jam both standard tunes and the classics.
10. Nautical. to head (a sailing ship) as nearly as possible into the wind without putting it in stays or putting it wholly aback.
–verb (used without object)
11. to become stuck, wedged, fixed, blocked, etc.: This door jams easily.
12. to press or push, often violently, as into a confined space or against one another: They jammed into the elevator.
13. (of a machine, part, etc.) to become unworkable, as through the wedging or displacement of a part.
14. Jazz. to participate in a jam session.
–noun
15. the act of jamming or the state of being jammed.
16. a mass of objects, vehicles, etc., jammed together or otherwise unable to move except slowly: a log jam; a traffic jam.
17. Informal. a difficult or embarrassing situation; fix: He got himself into a jam with his boss.
18. jam session.
Origin:
1700–10; appar. imit.; cf. champ 1 , dam 1
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jam

2  [jam]
–noun
1. a preserve of whole fruit, slightly crushed, boiled with sugar: strawberry jam.
—Idiom
2. put on jam, Australian Slang. to adopt a self-important manner or use affected speech.
Origin:
1720–30; perh. special use of jam 1

Related forms:
jamlike, jammy, adjective

Jam.

 
Jamaica.

jam session

 
–noun
1. a meeting of a group of musicians, esp. jazz musicians, to play for their own enjoyment.
2. an impromptu jazz performance or special performance by jazz musicians who do not regularly play together.
Also called jam.

Origin:
1930–35; perh. jam 1 , or by shortening of jamboree
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To jam
jam 1   (jām)   
v.   jammed, jam·ming, jams

v.   tr.

  1. To drive or wedge forcibly into a tight position: jammed the cork in the bottle.

  2. To activate or apply (a brake) suddenly. Often used with on: jammed the brakes on.

  3. To cause (moving parts, for example) to lock into an unworkable position: jammed the typewriter keys.

    1. To pack (items, for example) to excess; cram: jammed my clothes into the suitcase.

    2. To fill (a container or space) to overflowing: I jammed the suitcase with clothes. Fans jammed the hallway after the concert.

  5. To block, congest, or clog: a drain that was jammed by debris.

  6. To crush or bruise: jam a finger.

  7. Electronics To interfere with or prevent the clear reception of (broadcast signals) by electronic means.

  8. 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.

v.   intr.

  1. To become wedged or stuck.

  2. To become inoperable: The computer keyboard jammed.

  3. To force one's way into or through a limited space.

  4. Music To participate in a jam session.

  5. Basketball To make a dunk shot.

n.  

  1. The act of jamming or the condition of being jammed.

  2. A crush or congestion of people or things in a limited space: a traffic jam.

  3. A trying situation. See Synonyms at predicament.


[Origin unknown.]
jam'ma·ble adj., jam'mer n.
jam 2   (jām)   
n.  A preserve made from whole fruit boiled to a pulp with sugar.

[Possibly from jam1.]
jam'my adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Medical Dictionary

jam (jām)
v. jammed, jam·ming, jams

  1. To block, congest, or clog.

  2. To crush or bruise.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Computing Dictionary

JaM
John and Martin. An interpreted FORTH-like graphics language by John Warnock and Martin Newell, Xerox PARC, 1978. JaM was the forerunner of both Interpress and PostScript. It is mentioned in PostScript Language reference Manual, Adobe Systems, A-W 1985.

jam
A condition on a network where two nodes transmitting simultaneously detect the collision and continue to transmit for a certain time (4 to 6 bytes on Ethernet) to ensure that the collision has been detected by all nodes involved.
(1994-12-12)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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Idioms & Phrases

jam

see under get in a bind.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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