Meaning of “mouthwash” in the English Dictionary

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"mouthwash" in American English

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mouthwashnoun [ C/U ]

us /ˈmɑʊθˌwɑʃ, -ˌwɔʃ/

a liquid used for keeping the mouth clean and smelling fresh

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