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.
Dew point temperatures can indicate the amount of heat-retaining water vapor is in the air. Roberto Villalpando, Austin American Statesman, 1 Jan. 2026 The extra hydration and water vapor from a steaming mug of tea help thin the mucus. Angela Ryan Lee, Verywell Health, 31 Dec. 2025 That’s why the best winter systems combine moisture-wicking inner fabrics with venting options and membranes whose pores let water vapor escape while keeping liquid water out. Longji Cui, The Conversation, 26 Dec. 2025 Atmospheric rivers transport moisture from the tropics to northern latitudes in long, narrow bands of water vapor that form over an ocean and flow through the sky. Arkansas Online, 25 Dec. 2025 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 Jan. 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)
Last Updated: - Updated example sentences
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