Definition of 'jam'

Noun

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: fix hole mess muddle pickle kettle of fish
3. a dense crowd of people
      Synonyms: crush press
4. deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
      Synonyms: jamming electronic jamming

Verb

1. press tightly together or cram; "The crowd packed the auditorium"
      Synonyms: throng mob pack pile
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: jampack ram chock up cram wad
7. block passage through; "obstruct the path"
      Synonyms: obstruct obturate impede occlude block close up
      Antonyms: free disengage

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