'To jump at' definitions:

Definition of 'To jump at'

From: GCIDE
  • jump \jump\, v. i. [imp. & p. p. jumped (j[u^]mt; 215); 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]