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

Some social media users claim that mouthwash can raise blood pressure. — Laura Bradley, Health, 3 June 2026

The doctor prescribed her steroid mouthwash and oral steroids, but dismissed her request for a biopsy. — Charna Flam, PEOPLE, 16 May 2026

Antiseptic mouthwash may not be the daily habit most people assume. — Allison Palmer, Fort Worth Star-Telegram, 2 July 2026

Instantly refresh your breath with Swishables, the mouthwash that keeps you feeling confident. — ABC News, 20 June 2026

Word History

First Known Use

1840, in the meaning defined above

Rhymes for mouthwash

• backwash
• downwash
• outwash
• panache
• whitewash
• bosh
• frosh
• gosh
• josh
• posh
• quash
• slosh

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