locust Definition

locust¹
noun

1. Any of various large grasshoppers noted for their tendency to form dense swarms and migrate, eating all the vegetation in their path, including crops.
2. Someone or something that destroys or devours.

Etymology: 13c: from Latin locusta lobster or locust.

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locust²
noun

1. The carob.

Form: locust tree (also)
2. The edible seed pod of this tree, often ground and used as a substitute for chocolate.

Form: locust bean (also)

Etymology: 17c: because the seed pod resembles a locust.