• (countable) A difficult situation.

    "I’m in a jam right now. Can you help me out?"

  • (countable, popular music) An informal, impromptu performance or rehearsal.
  • (dated) A kind of frock for children.
  • (countable, roller derby) A play during which points can be scored.

    "Toughie scored four points in that jam."

  • A sweet mixture of fruit boiled with sugar and allowed to congeal. Often spread on bread or toast or used in jam tarts.
  • (countable) Blockage, congestion.

    "a jam of logs in a river"

  • (countable, basketball) A forceful dunk.
  • (Britain) luck.

    "He's got more jam than Waitrose."

  • (countable) Blockage, congestion.

    "A traffic jam caused us to miss the game's first period."

  • (countable, baseball) A difficult situation for a pitcher or defending team.

    "He's in a jam now, having walked the bases loaded with the cleanup hitter coming to bat."

  • (mining) Alternative form of jamb
  • (climbing, countable) Any of several maneuvers requiring wedging of an extremity into a tight space.

    "I used a whole series of fist and foot jams in that crack."


  • To get something stuck in a confined space.

    "Her poor little baby toe got jammed in the door."

  • To brusquely force something into a space; cram, squeeze.

    "The rush-hour train was jammed with commuters."

  • (baseball) To throw a pitch at or near the batter's hands.

    "Jones was jammed by the pitch."

  • (roller derby) To attempt to score points.

    "Toughie jammed four times in the second period."

  • To get something stuck in a confined space.

    "My foot got jammed in a gap between the rocks."

  • To brusquely force something into a space; cram, squeeze.

    "They temporarily stopped the gas tank leak by jamming a piece of taffy into the hole."

  • To block or confuse a broadcast signal.
  • To injure a finger or toe by sudden compression of the digit's tip.

    "When he tripped on the step he jammed his toe."

  • (Canada, informal) To give up on a date or some joint endeavour; stand up, chicken out, jam out.
  • To get something stuck in a confined space.

    "I jammed the top knuckle of my ring finger."

  • To cause congestion or blockage. Often used with "up"

    "A single accident can jam the roads for hours."

  • (music) To play music (especially improvisation as a group, or an informal unrehearsed session).
  • (nautical) To bring (a vessel) so close to the wind that half her upper sails are laid aback.

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