What is the meaning of jamming?

noun

• Deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems.
  • synonyms: electronic jamming, jam

verb

• Press tightly together or cram.
  • usage: "The crowd packed the auditorium"
  • synonyms: throng, mob, pack, pile, jam
• Push down forcibly.
  • usage: "The driver jammed the brake pedal to the floor"
  • synonyms: jam
• Crush or bruise.
  • usage: "jam a toe"
  • synonyms: jam, crush
• Interfere with or prevent the reception of signals.
  • usage: "Jam the Voice of America"; "block the signals emitted by this station"
  • synonyms: jam, block
• Get stuck and immobilized.
  • usage: "the mechanism jammed"
  • synonyms: jam
• Crowd or pack to capacity.
  • usage: "the theater was jampacked"
  • synonyms: jam, jampack, ram, chock up, cram, wad
• Block passage through.
  • usage: "obstruct the path"
  • synonyms: obstruct, obturate, impede, occlude, jam, block, close up