n. One of the orthopterous saltatorial insects of the family Acridiiæ, popularly known as grasshoppers, and more correctly called short-horned grasshoppers.n. An orthopterous saltatorial insect of the genus Locusta, family Locustidæ.n. A homopterous insect of the genus Cicada, family Cicadidæ, such as the harvest-fly, Cicada tibicon, and the seventeen-year locust, or periodical cicada, Cicada septendecim. See cut under Cicadidæ.n. A cockchafer; a beetle.To devour and lay waste like locusts; ravage.n. A well-known tree of the United States, Robinia Pseudacacia, with thorny branches, delicate pinnate leaves, and dense clusters of white heavily scented flowers.n. The carob-tree, Ceratonia Siligua. See Ceratonia and carob.n. The wood of the locust-tree.n. A club or billy used by policemen: so called because commonly made of locust-wood.