·noun The locust tree. ·see Locust Tree (definition, note, and phrases).
II. Locust ·noun Any one of numerous species of long-winged, migratory, orthopterous insects, of the family Acrididae, allied to the grasshoppers; ·esp., (Edipoda, / 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.