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

Doctors in the emergency room were unable to diagnose the problem and the unnamed man was sent home with a prescription for mouthwash, antibiotics and steroids. Wire Service, The Mercury News, "He said something was stuck in his throat after surgery. The doctors didn’t believe him.," 13 Aug. 2019 During the patient's first return to the emergency room, doctors were unable to diagnose the problem and the unnamed man was sent home with a prescription for mouthwash, antibiotics and steroids. Rob Picheta, CNN, "A man's false teeth got stuck in his throat during a surgery. It was eight days before anyone noticed.," 12 Aug. 2019 Medix Hyaluronic Acid + Bulgarian Rose Instant Hydration Cream - $13.07 Khloé also supports Moon, a new elevated oral care brand that sister Kendall Jenner partnered with, by using the refreshing flouride-free charcoal and peppermint mouthwash. Kaitlyn Frey,, "The Beauty Products Khloé Kardashian Uses in Her Current Skincare Lineup," 27 Aug. 2019 Her home, too, is filled with value packs of sanitary napkins and stacks of shampoo and mouthwash. Christine Condon,, "Committed to helping homeless, Laurel Councilwoman Nicholas to be honored for volunteering," 26 July 2019 Pride-themed merchandise has become ubiquitous almost to the point of self-parody in the past couple of years: Listerine mouthwash? Hilary George-parkin, Vox, "Rainbow Listerine and bottles of Bud Light: what happens to the merch when Pride is over," 2 July 2019 Triclosan can be found in soaps, toothpastes, mouthwashes, and hand sanitizers. Maggie O'neill,, "What is Triclosan? Study Links Common Ingredient in Toothpastes and Soaps With Osteoporosis," 27 June 2019 NeueHouse even offers tasteful decanters of mouthwash in the restrooms, with tiny paper cups, to keep everyone minty fresh. Jeanette Marantos,, "How do you make people care? Throw a dinner party with Zooey Deschanel," 14 June 2019 Volunteers packed diapers, mouthwash, lotion, shampoo, toilet paper and other hygiene items into bags to be donated to domestic-violence shelters around the Valley. Serena O'sullivan, azcentral, "Arizona chapter of Moms Demand Action helps domestic-violence victims," 8 June 2019

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

Statistics for mouthwash

Last Updated

21 Sep 2019

Look-up Popularity

Time Traveler for mouthwash

The first known use of mouthwash was in 1840

See more words from the same year

Keep scrolling for more

More Definitions for mouthwash



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

Rhyming Dictionary: Words that rhyme with mouthwash

Spanish Central: Translation of 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).


suitable to be imparted to the public

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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