Webster's Revised Unabridged Dictionary · 1913

Locust

Locust , noun

[Latin locusta locust, grasshopper. Compare Lobster.]

1.
(Zoology) Any one of numerous species of long-winged, migratory, orthopterous insects, of the family Acridida, allied to the grasshoppers; esp., (Edipoda migratoria, syn. Pachytylus migratoria, and Acridium perigrinum, of Southern Europe, Asia, and Africa. In the United States the related species with similar habits are usually called grasshoppers. See Grasshopper.

These insects are at times so numerous in Africa and the south of Asia as to devour every green thing; and when they migrate, they fly in an immense cloud. In the United States the harvest flies are improperly called locusts. See Cicada.

Collocations (4)
Locust beetle (Zoology) , a longicorn beetle (Cyllene robinia), which, in the larval state, bores holes in the wood of the locust tree. Its color is brownish black, barred with yellow. Called also locust borer.
Locust bird (Zoology) , the rose-colored starling or pastor of India. See Pastor.
Locust hunter (Zoology) , an African bird; the beefeater.
Locust bean (Botany) , a commercial name for the sweet pod of the carob tree.
2.
(Botany) The locust tree. See Locust Tree (definition, note, and phrases).