Definition of locust
1
: short-horned grasshopper
especially
: a migratory grasshopper often traveling in vast swarms and stripping the areas passed of all vegetation
2
: cicada
3a
: any of various leguminous trees: such as
(1)
: carob sense 1
(2)
: black locust
(3)
: honey locust
b
: the wood of a locust tree
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Merriam-Webster unabridged
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Time Traveler for locust
The first known use of locust was in the 14th century
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