WordWeb Online

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, ram, chock up, cram, wad
    
7. Block passage through
   "jam the path";
   - obstruct, obturate, impede, occlude, block, close up
    
8. (popular music) play music in a group, esp. improvising

1. Preserve of crushed fruit
    
2. Informal term for a difficult situation
   "he got into a terrible jam";
   - fix, hole, mess, muddle, pickle, kettle of fish
    
3. A dense crowd of people
   - crush, press
    
4. Deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
   - jamming, electronic jamming
    
5. (popular music) an informal, impromptu performance or rehearsal

Sounds like: its, i, jam

Derived forms: jammed, jams, jamming

Type of: break up, bruise, conserve, conserves, contuse, crowd, crowd together, cut off, difficulty, disrupt, ECM, electronic countermeasures, force, hinder, impede, interrupt, malfunction, misfunction, preserve, preserves, push, stuff

Encyclopedia: Jam Jam, Iran