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.
The presence of gases such as methane, ammonia, and water vapor may further stabilize these environments, significantly extending the potential window for habitability. Jijo Malayil, Interesting Engineering, 22 Mar. 2026 At the same time, a warmer atmosphere holds more water vapor, which is then released in fewer, more extreme rainstorms. Clara Harter, Los Angeles Times, 20 Mar. 2026 Essentially, when there’s a lot of water vapor in the atmosphere, that represents potential—or latent—heat. Andrea Thompson, Scientific American, 20 Mar. 2026 Scaling up production When cast into thin films, these components self-organize into a dense structure that resists swelling with water vapor. J. Carson Meredith, The Conversation, 17 Mar. 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 28 Mar. 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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