Definition of “underarm” - English Dictionary

“underarm” in English

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

“underarm” in American English

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underarmadjective [ not gradable ]

us /ˈʌn·dərˌɑrm/

of or for use in the armpit (= the hollow place under your arm where your arm joins your body):

underarm deodorants

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