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Noun: jam  jam
  1. A number of vehicles blocking one another until they can scarcely move
    - traffic jam, snarl-up
  2. A dense crowd of people
    - crush, press
  3. Preserve of crushed fruit
  4. [informal] The quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result
    - difficulty, difficultness, fix [informal], hole [informal], mess [informal], muddle [informal], pickle [informal], kettle of fish [informal]
  5. Deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
    - jamming, electronic jamming
  6. A blockage or something stuck that prevents a device from working properly
    "there's a jam in the printer"
  7. [informal] (popular music) an informal, impromptu performance or rehearsal
Verb: jam (jammed,jamming)  jam
  1. Press tightly together or cram
    "The crowd jammed the auditorium";
    - throng, mob, pack, pile
  2. Push down forcibly
    "The driver jammed the brake pedal to the floor"
  3. Hurt or bruise with a squashing force
    "jam a toe";
    - crush
  4. Interfere with or prevent the reception of signals
    "Jam the Voice of America";
    - block
  5. Get stuck and immobilized
    "the mechanism jammed"
  6. Crowd or pack to capacity
    "the theatre was jammed";
    - jampack [informal], ram, cram, wad
  7. Block passage through
    "jam the path";
    - obstruct, obturate, impede, occlude, block, close up
  8. [informal] (popular music) play music in a group, esp. improvising

Sounds like: its, i, jam

Derived forms: jammed, jams, jamming

See also: difficult, hard

Type of: break up, bruise, conserve, conserves, contuse, crowd, crowd together, cut off, disrupt, ECM, electronic countermeasures, entrammel [literary], fetter [literary], force, hinder, impede, interrupt, malfunction, misfunction, preserve, preserves, push, quality, stuff, trammel [literary]

Encyclopedia: Jam, Khuzestan