jamming, electronic jamming, jam

(noun) deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems


(noun) preserve of crushed fruit

crush, jam, press

(noun) a dense crowd of people

fix, hole, jam, mess, muddle, pickle, kettle of fish

(noun) informal terms for a difficult situation; “he got into a terrible fix”; “he made a muddle of his marriage”

jam, block

(verb) interfere with or prevent the reception of signals; “Jam the Voice of America”; “block the signals emitted by this station”

obstruct, obturate, impede, occlude, jam, block, close up

(verb) block passage through; “obstruct the path”

jam, crush

(verb) crush or bruise; “jam a toe”

jam, jampack, ram, chock up, cram, wad

(verb) crowd or pack to capacity; “the theater was jampacked”


(verb) get stuck and immobilized; “the mechanism jammed”


(verb) push down forcibly; “The driver jammed the brake pedal to the floor”

throng, mob, pack, pile, jam

(verb) press tightly together or cram; “The crowd packed the auditorium”

Source: WordNet® 3.1

Etymology 1


jam (countable and uncountable, plural jams)

A sweet mixture of fruit boiled with sugar and allowed to congeal. Often spread on bread or toast or used in jam tarts.

(countable) A difficult situation.

(countable) Blockage, congestion.

(countable, popular music) An informal, impromptu performance or rehearsal.

(countable, by extension, informal) A song; a track.

(countable, by extension) An informal event where people brainstorm and collaborate on projects.

(countable, baseball) A difficult situation for a pitcher or defending team.

(countable, basketball) A forceful dunk.

(countable, roller derby) A play during which points can be scored.

(climbing, countable) Any of several maneuvers requiring wedging of an extremity into a tight space.

(UK, slang) luck.

(slang) sexual relations or the contemplation of them.


• (sweet mixture of fruit): conserve, (US) jelly, preserve

• See also difficult situation


jam (third-person singular simple present jams, present participle jamming, simple past and past participle jammed)

To get something stuck in a confined space.

To brusquely force something into a space; cram, squeeze.

To cause congestion or blockage. Often used with "up"

To block or confuse a broadcast signal.

(baseball) To throw a pitch at or near the batter's hands.

(music) To play music (especially improvisation as a group, or an informal unrehearsed session).

To injure a finger or toe by sudden compression of the digit's tip.

(roller derby) To attempt to score points.

(nautical) To bring (a vessel) so close to the wind that half her upper sails are laid aback.

(Canadian, informal) To give up on a date or some joint endeavour; stand up, chicken out, jam out.


• ram

Etymology 2


jam (plural jams)

(dated) A kind of frock for children.

Etymology 3


jam (plural jams)

(mining) Alternative form of jamb


• JMA, Maj, Maj., maj.


Initialism, from just about managing.


JAM (plural JAMs)

(UK, informal) A household that is only barely able to meet its financial obligations.


• JMA, Maj, Maj., maj.

Source: Wiktionary

Jam, n. Etym: [Per. or Hind. jamah garment, robe.]

Definition: A kind of frock for children.

Jam, n. (Mining)

Definition: See Jamb.

Jam, v. t. [imp. & p. p. Jammed; p. pr. & vb. n. Jamming.] Etym: [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. The . . . 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.)

Definition: To bring (a vessel) so close to the wind that half her upper sails are laid aback. W. C. Russell.

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.

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

Jam, n. Etym: [Prob. fr. jam, v.; but cf. also Ar. jamad ice, jelly, jamid congealed, jamd congelation, ice.]

Definition: A preserve of fruit boiled with sugar and water; as, raspberry jam; currant jam; grape jam. Jam nut. See Check nut, under Check.

– Jam weld (Forging), a butt weld. See under Butt.

Source: Webster’s Unabridged Dictionary 1913 Edition


Word of the Day

27 September 2023


(noun) the act of retiring into inactivity; “he emerged from his hibernation to make his first appearance in several years”

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