Jumbo definitions

jŭm'bō
An unusually large person, animal, or thing.
noun
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Unusually large.

Jumbo shrimp; a jumbo jet.

adjective
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A very large person, animal, or thing.
noun
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Very large; larger than usual of its kind.

A jumbo jet airliner.

adjective
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Especially large or powerful.
adjective
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An especially large or powerful person, animal or thing.
noun
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A popular name for an elephant.
noun
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Origin of jumbo

After Jumbo , a large elephant exhibited by P.T. Barnum probably from slang clumsy person