n. 1. The act of jumping; a leap; a spring; a bound. “To advance by jumps.” Locke. [ 1913 Webster ]

2. An effort; an attempt; a venture. [ Obs. ] [ 1913 Webster ]

Our fortune lies
Upon thisjump. Shak. [ 1913 Webster ]

3. The space traversed by a leap. [ 1913 Webster ]

4. (Mining) A dislocation in a stratum; a fault. [ 1913 Webster ]

5. (Arch.) An abrupt interruption of level in a piece of brickwork or masonry. [ 1913 Webster ]

6. A jump-start; as, to get a jump from a passing mmotorist. [ PJC ]

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. [ 1913 Webster ]

adv. Exactly; pat. [ Obs. ] Shak. [ 1913 Webster ]

v. t. 1. To pass over by means of a spring or leap; to overleap; as, to jump a stream. [ 1913 Webster ]

2. To cause to jump; as, he jumped his horse across the ditch. [ 1913 Webster ]

3. To expose to danger; to risk; to hazard. [ Obs. ] [ 1913 Webster ]

To jump a body with a dangerous physic. Shak. [ 1913 Webster ]

4. (Smithwork) (a) To join by a butt weld. (b) To thicken or enlarge by endwise blows; to upset. [ 1913 Webster ]

5. (Quarrying) To bore with a jumper. [ 1913 Webster ]

To jump a claim, to enter upon and take possession of land to which another has acquired a claim by prior entry and occupation. [ Western U. S. & Australia ] See Claim, n., 3. --
To jump one's bail, to abscond while at liberty under bail bonds. [ Slang, U. S. ] --
To jump the gun, to begin to run (in a footrace) before the starting gun has fired; hence, (fig.) to begin any activity before the designated starting time. [ 1913 Webster +PJC ]

a. Nice; exact; matched; fitting; precise. [ Obs. ] “Jump names.” B. Jonson. [ 1913 Webster ]

n. same as jump-start, n.. [ PJC ]

n. [ Cf. F. jupe a long petticoat, a skirt. Cf. juppon. ] (a) A kind of loose jacket for men. (b) pl. A bodice worn instead of stays by women in the 18th century. [ 1913 Webster ]

v. t. Same as jump-start, v. t.. [ PJC ]

v. i. [ imp. & p. p. jumped p. pr. & vb. n. jumping. ] [ Akin to OD. gumpen, dial. G. gumpen, jumpen. ] [ 1913 Webster ]

1. To spring free from the ground by the muscular action of the feet and legs; to project one's self through the air; to spring; to bound; to leap. [ 1913 Webster ]

Not the worst of the three but jumps twelve foot and a half by the square. Shak. [ 1913 Webster ]

2. To move as if by jumping; to bounce; to jolt. “The jumping chariots.” Nahum iii. 2. [ 1913 Webster ]

A flock of geese jump down together. Dryden. [ 1913 Webster ]

3. To coincide; to agree; to accord; to tally; -- followed by with. “It jumps with my humor.” Shak. [ 1913 Webster ]

To jump at, to spring to; hence, fig., to accept suddenly or eagerly; as, a fish jumps at a bait; to jump at a chance. [ 1913 Webster ]

adj. Upstart. [ British informal ] [ WordNet 1.5 ]

n. [ See 1st Jump. ] 1. A loose upper garment; as: (a) A sort of blouse worn by workmen over their ordinary dress to protect it. (b) A fur garment worn in Arctic journeys. [ 1913 Webster ]

2. A sleeveless one-piece dress, either with full shoulders or straps, sometimes with only the front part of the bodice, usually worn by women with a blouse underneath. [ PJC ]