morning breath

noun

: halitosis upon awakening from sleep that is caused by the buildup of bacteria in the mouth from decreased saliva production

Examples of morning breath 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.
If mouth breathing could be causing bad morning breath, Dr. Sulitzer recommends investing in a new toothbrush that can help remove all food and residue buildup from your teeth and gums, as well as a water flosser to thoroughly clean the gums and rehydrate your mouth. — Jaclyn Smock, Allure, 10 Feb. 2023 Your morning breath sends your partner running. — Samantha Lefave, Redbook, 3 Aug. 2018

Word History

First Known Use

1968, in the meaning defined above

Time Traveler
The first known use of morning breath was in 1968

Rhymes for morning breath

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morning-after pill
morning breath
morning campion
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“Morning breath.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/morning%20breath. Accessed 31 Mar. 2025.

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Medical Definition

morning breath

noun
morn·​ing breath ˈmȯr-niŋ- How to pronounce morning breath (audio)
: halitosis upon awakening from sleep that is caused by the buildup of bacteria in the mouth due to decreased saliva production
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