jam

Noun · Verb
Synonyms: fixholemessmuddlepicklekettle of fishcrushpressjammingelectronic jammingthrongmob

WordNet 3.0

Noun (4)

  1. preserve of crushed fruit
  2. informal terms for a difficult situation“he got into a terrible fix”“he made a muddle of his marriage”Synonyms: fixholemessmuddlepicklekettle of fish
  3. a dense crowd of peopleSynonyms: crushpress
  4. deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systemsSynonyms: jammingelectronic jamming

Verb (7)

  1. press tightly together or cram“The crowd packed the auditorium”Synonyms: throngmobpackpile
  2. push down forcibly“The driver jammed the brake pedal to the floor”
  3. crush or bruise“jam a toe”Synonyms: crush
  4. interfere with or prevent the reception of signals“Jam the Voice of America”“block the signals emitted by this station”Synonyms: block
  5. get stuck and immobilized“the mechanism jammed”
  6. crowd or pack to capacity“the theater was jampacked”Synonyms: jampackramchock upcramwad
  7. block passage through“obstruct the path”Synonyms: obstructobturateimpedeoccludeblockclose up
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Webster's Dictionary (GCIDE)

Jam \Jam\, 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. [1913 Webster]

2.An injury caused by jamming. [Colloq.] [1913 Webster]

3.A difficult situation; as, he got himself into a jam. [informal] [PJC]

Jam \Jam\, n. [Prob. fr. jam, v.; but cf. also Ar. jamad ice, jelly, j[=a]mid congealed, jamd congelation, ice.] A preserve of fruit boiled with sugar and water; also called jelly; as, raspberry jam; currant jam; grape jam. [1913 Webster]

Jam nut. See Check nut, under Check.

Jam weld (Forging), a butt weld. See under Butt. [1913 Webster]

Jam \Jam\ (j[a^]m), n. [Per. or Hind. j[=a]mah garment, robe.] A kind of frock for children. [1913 Webster]
Jam \Jam\, n. (Mining) See Jamb. [1913 Webster]
Jam \Jam\, v. t. [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.] [1913 Webster]

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. [1913 Webster]

The ship . . . jammed in between two rocks.— De Foe.[1913 Webster]

2.To crush or bruise; as, to jam a finger in the crack of a door. [Colloq.] [1913 Webster]

3.(Naut.) To bring (a vessel) so close to the wind that half her upper sails are laid aback. --W. C. Russell. [1913 Webster]

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]

Jam \Jam\, v. i.

2.To become stuck so as not to function; as, the copier jammed again. [PJC]

2.(Music) To play an instrument in a jam session. [PJC]

3.To crowd together; -- usually used with together or in; as, fifty people jammed into a conference room designed for twenty. [PJC]

Free On-line Dictionary of Computing

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)

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