1. (n.) Any jumping, orthopterous insect, of the families Acrididae and Locustidae. The species and genera are very numerous. The former family includes the Western grasshopper or locust (Caloptenus spretus), noted for the great extent of its ravages in the region beyond the Mississippi. In the Eastern United States the red-legged (Caloptenus femurrubrum and C. atlanis) are closely related species, but their ravages are less important. They are closely related to the migratory locusts of the Old World. See Locust.

2. (n.) In ordinary square or upright pianos of London make, the escapement lever or jack, so made that it can be taken out and replaced with the key; -- called also the hopper.

broad jumper bucking bronco buckjumper cicada cicala cricket dog-day cicada feckless flea frog gazelle goat happy-go-lucky heedless high jumper hopper hoppergrass hurdle racer hurdler improvident jackrabbit jumper jumping bean jumping jack kangaroo leaper locust negligent pole vaulter salmon shiftless stag sunfisher thoughtless thriftless timber topper uneconomical unproviding unthrifty vaulter