water vapor

noun

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)

Examples of water vapor 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.
And pushing to higher resolution for oxygen would roughly double the exposure time needed for water vapor. Paul Sutter, Space.com, 10 June 2026 Each snapshot contains information on temperature, air pressure, wind, water vapor, cloud cover, precipitation, solar radiation, and soil moisture. ArsTechnica, 8 June 2026 The exhaust fan in your bathroom works the same way the one over your stovetop removes steam, water vapor, and odors during cooking. Karen Brewer Grossman, Southern Living, 3 June 2026 The device uses high-voltage electricity to ionize a mixture of helium, air, and water vapor. Chris Young, Interesting Engineering, 2 June 2026 See All Example Sentences for water vapor

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of water vapor was in the 15th century

Browse Nearby Words

Cite this Entry

“Water vapor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20vapor. Accessed 12 Jun. 2026.

Kids Definition

water vapor

noun
: water in a gaseous form especially when below boiling temperature and spread through the atmosphere

Medical Definition

water vapor

noun
: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)
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