jam /ˈʤæm/
  果醬,擁塞之物,堵塞,困境(vt.)擠進,使塞滿,混雜,壓碎,使堵塞(vi.)堵塞
  jam
  卡住; 夾紙
  jam
  干擾 夾紙
  Jam n.  A kind of frock for children.
  Jam, v. t.  [imp. & p. p. Jammed p. pr. & vb. n. Jamming.]
  1.  To press into a close or tight position; to crowd; to squeeze; to wedge in; to cram; as, rock fans jammed the theater for the concert.
     The ship . . . jammed in between two rocks.   --De Foe.
  2.  To crush or bruise; as, to jam a finger in the crack of a door. [Colloq.]
  3.  Naut. To bring (a vessel) so close to the wind that half her upper sails are laid aback.
  Jam, n.
  1. A mass of people or objects crowded together; also, the pressure from a crowd; a crush; as, a jam in a street; a jam of logs in a river.
  2.  An injury caused by jamming. [Colloq.]
  Jam, n.  A preserve of fruit boiled with sugar and water; also called jelly; as, raspberry jam; currant jam; grape jam.
  Jam nut. See Check nut, under Check.
  Jam weld Forging, a butt weld. See under Butt.
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  jam
       n 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" [syn: fix,
           hole, mess, muddle, pickle, kettle of fish]
       3: a dense crowd of people [syn: crush, press]
       4: deliberate radiation or reflection of electromagnetic energy
          for the purpose of disrupting enemy use of electronic
          devices or systems [syn: jamming, electronic jamming]
       v 1: press tightly together or cram; "The crowd packed the
            auditorium" [syn: throng, mob, pack, pile]
       2: push down forcibly; "The driver jammed the brake pedal to
          the floor"
       3: crush or bruise; "jam a toe" [syn: crush]
       4: interfere with or prevent the reception of signals; "Jam the
          Voice of America"; "block the signals emitted by this
          station" [syn: block]
       5: get stuck and immobilized; "the mechanism jammed"
       6: crowd or pack to capacity; "the theater was jampacked" [syn:
           jampack, ram, chock up, cram, wad]
       7: block passage through; "obstruct the path" [syn: obstruct,
           obturate, impede, occlude, block, close up]
          [ant: free]
       [also: jamming, jammed]