Definition of mouthwash
: a usually antiseptic liquid preparation for cleaning the mouth and teeth or freshening the breath
Recent Examples of mouthwash from the Web
Stephen Colbert uses hand sanitizer as mouthwash on the air.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mouthwash'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of mouthwash
MOUTHWASH Defined for English Language Learners
Definition of mouthwash for English Language Learners
: a liquid that is used to clean your mouth and teeth and to make your breath smell better
Seen and Heard
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