Definition of “underpants” - English Dictionary

british dictionary

(Definition of “underpants” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“underpants” in American English

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underpantsplural noun

us /ˈʌn·dərˌpænts/

a piece of underwear covering the area between the waist and the top of the legs:

a pair of underpants

(Definition of “underpants” from the Cambridge Academic Content Dictionary © Cambridge University Press)