jam

Noun

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

• a dense crowd of people

• informal terms for a difficult situation
  • he got into a terrible fix
    
  • he made a muddle of his marriage
    

• preserve of crushed fruit

Verb

• block passage through
  • obstruct the path
    

• crowd or pack to capacity
  • the theater was jampacked
    

• get stuck and immobilized
  • the mechanism jammed
    

• interfere with or prevent the reception of signals
  • Jam the Voice of America
    
  • block the signals emitted by this station
    

• crush or bruise
  • jam a toe
    

• push down forcibly
  • The driver jammed the brake pedal to the floor
    

• press tightly together or cram
  • The crowd packed the auditorium
    

Related words

• Synonyms: 
  jamming , electronic jamming , crush , press , fix , hole , mess , muddle , pickle , kettle of fish , obstruct , obturate , impede , occlude , block , close up , jampack , ram , chock up , cram , wad , throng , mob , pack , pile
• Antonyms: 
  free , disengage