mouth·​wash | \ ˈmau̇th-ˌwȯsh How to pronounce mouthwash (audio) , -ˌwäsh \

Definition of mouthwash

: a usually antiseptic liquid preparation for cleaning the mouth and teeth or freshening the breath

Examples of mouthwash in a Sentence

Recent Examples on the Web Wash your hands, wear a mask and don’t forget to gargle with mouthwash. Saabira Chaudhuri, WSJ, "Gargling Could Slow Covid-19 Spread, Mouthwash Makers Say," 12 Dec. 2020 Further, the study’s conclusions don’t suggest that mouthwash would be able to prevent all COVID-19 transmission. Rachael Zisk, Popular Science, "Mouthwash won’t stop you from spreading COVID-19," 30 Nov. 2020 But mouthwash is unlikely to ever be a solution to the pandemic, or even someone's own personal protection plan. Eliza Mackintosh, CNN, "What you need to know about coronavirus on Wednesday, November 18," 18 Nov. 2020 Others predicted that panic buying of mouthwash would soon begin. Mckenzie Sadeghi, USA TODAY, "Fact check: Experts caution mouthwash's effect on COVID-19 needs more study," 25 Nov. 2020 Spotlight also recommends using mouthwash to further break down any teeth stains, as well as its Comforting Gum Oil that’s included in the set and soothes tender gums. Zoe Malin, NBC News, "New & Notable: Best new products from Away, Beats, June and more," 23 Nov. 2020 Cardiff University is conducting a clinical trial on the effect of mouthwash on actual patients at University Hospital of Wales. Cassidy Morrison, Washington Examiner, "Illinois and Ohio add restrictions as pandemic hits Midwest," 17 Nov. 2020 Specifically, a saline solution that comes as part of a single-use home-testing mouthwash kit from Lead Horizon, Steininger’s diagnostics firm. David Meyer, Fortune, "Want to bring back major sports events and concerts? The answer may lie in a mouthwash test for COVID," 14 Nov. 2020 Studying the effects of mouthwash and other oral antiseptic rinses on infectious viruses is not a novel idea. Allyson Chiu, Washington Post, "What those studies on mouthwash and coronaviruses actually mean," 8 Oct. 2020

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.

See More

First Known Use of mouthwash

1840, in the meaning defined above

Keep scrolling for more

Learn More about mouthwash

Time Traveler for mouthwash

Time Traveler

The first known use of mouthwash was in 1840

See more words from the same year

Statistics for mouthwash

Last Updated

17 Dec 2020

Cite this Entry

“Mouthwash.” Dictionary, Merriam-Webster, Accessed 15 Jan. 2021.

Keep scrolling for more

More Definitions for mouthwash


How to pronounce mouthwash (audio)

English Language Learners Definition of mouthwash

: a liquid that is used to clean your mouth and teeth and to make your breath smell better


mouth·​wash | \ ˈmau̇th-ˌwȯsh, -ˌwäsh How to pronounce mouthwash (audio) \

Medical Definition of mouthwash

: a liquid preparation (as an antiseptic solution) for cleansing the mouth and teeth

called also collutorium

More from Merriam-Webster on mouthwash

Nglish: Translation of mouthwash for Spanish Speakers

Comments on mouthwash

What made you want to look up mouthwash? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Words of Snow and Ice Quiz

  • image1037863653
  • Which of the following refers to thin, bending ice, or to the act of running over such ice?
True or False

Test your knowledge - and maybe learn something along the way.


Anagram puzzles meet word search.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!