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.
People only get sick by breathing in water vapor containing Legionella bacteria, officials said. Thomas Tracy, New York Daily News, 4 July 2026 The air there is also extremely dry, which matters because water vapor normally helps absorb and redistribute heat. Brandi D. Addison, USA Today, 1 July 2026 Engineers have developed a jacket capable of converting water vapor from the air into drinking water. Teresa Mull, FOXNews.com, 26 June 2026 During the final launch sequence in the film, the room fills with water vapor simulating clouds and fog from the launch. Marla Jo Fisher, Daily News, 24 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 6 Jul. 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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