night guard

noun

variants or less commonly nightguard
plural night guards also nightguards
: mouth guard sense 2a
… a night guard that fits between the teeth and makes grinding more difficult.Melinda Beck

Examples of night guard in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The saddest part is when Josh reminds her to bring her night guard. Rafaela Bassili, Vulture, 16 Apr. 2026

Word History

First Known Use

1973, in the meaning defined above

Time Traveler
The first known use of night guard was in 1973

Browse Nearby Words

Cite this Entry

“Night guard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/night%20guard. Accessed 2 May. 2026.

Love words? Need even more definitions?

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

More from Merriam-Webster