Source : Webster's Revised Unabridged Dictionary (1913)

Jump \Jump\, n.
   1. The act of jumping; a leap; a spring; a bound. ``To
      advance by jumps.'' --Locke.

   2. An effort; an attempt; a venture. [Obs.]

            Our fortune lies Upon thisjump.       -- Shak.

   3. The space traversed by a leap.

   4. (Mining) A dislocation in a stratum; a fault.

   5. (Arch.) An abrupt interruption of level in a piece of
      brickwork or masonry.

   {From the jump}, from the start or beginning. [Colloq.]

   {Jump joint}.
      (a) A butt joint.
      (b) A flush joint, as of plank in carvel-built vessels.

   {Jump seat}.
      (a) A movable carriage seat.
      (b) A carriage constructed with a seat which may be
          shifted so as to make room for second or extra seat.
          Also used adjectively; as, a jump-seat wagon.