mouthwash

noun

mouth·​wash ˈmau̇th-ˌwȯsh 

-ˌwäsh

: 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

Use an antibacterial mouthwash to reduce bacteria in your mouth and prevent gum disease. —Anna Giorgi, Verywell Health, 10 Jan. 2025

Strong gargling with saltwater or mouthwash may help remove stones from your tonsils. —Sarah Hudgens, Health, 5 Oct. 2024

This has led to its widespread addition to public water supplies—a practice known as water fluoridation—and its inclusion in dental products like toothpaste and mouthwash. —David Faris, Newsweek, 2 Feb. 2025

Talk to your dental care provider before adding mouthwash to your oral care routine. —Heather Jones, Verywell Health, 5 Jan. 2025

Word History

First Known Use

1840, in the meaning defined above

Kids Definition

mouthwash

noun

mouth·​wash ˈmau̇th-ˌwȯsh 

-ˌwäsh

: a liquid that usually kills germs and is used to clean the mouth and teeth and freshen the breath

Medical Definition

mouthwash

noun

mouth·​wash ˈmau̇th-ˌwȯsh, -ˌwäsh 

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

called also collutorium