Locust definition

lōkəst
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A cicada, especially a periodical cicada.
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Any of various large grasshoppers; specif., a migratory grasshopper often traveling in great swarms and causing extensive damage to vegetation.
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The definition of a locust is a type of grasshopper that migrates in huge numbers quickly eating the plants in their path, or a hardwood tree with fragrant white flowers.

An example of a locust is the plague told about in Exodus 10:1-20 in the New International Version of the Bible.

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Any of several trees of the pea family bearing long pods, especially the black locust, honey locust, and carob.
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The wood of any of these trees.
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Any honeylocust.
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A spiny tree (Robinia pseudoacacia) of the pea family, native to the E or central U.S. and having long, pendulous racemes of fragrant white flowers.
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The yellowish, hard, durable wood of this tree.
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A type of grasshopper in the family Acrididae that flies in swarms and is very destructive to crops and other vegetation.
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A locust tree.
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Any of various short-horned grasshoppers that sometimes migrate in immense swarms, devouring vegetation and crops.
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Other Word Forms

Noun

Singular:
locust
Plural:
locusts

Origin of locust

  • Middle English from Old French locuste from Latin locusta Sense 3a, probably from the resemblance of a carob pod to a grasshopper and the use of both as subsistence food in drier regions of the Near East

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Old French langouste, from Latin locusta (“locust, crustacean, lobster").

    From Wiktionary