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.
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 Ajami pointed out that extreme heat is not only causing snow to melt faster but is also causing sublimation, in which snow is transformed directly to water vapor. Ian James, Los Angeles Times, 16 Mar. 2026 These membranes contain microscopic pores designed to block liquid water from entering from the outside of the boot while allowing water vapor to escape from the inside. Alisha McDarris, Outside, 7 Mar. 2026 Another key process is sublimation, where ice turns directly into water vapor without melting first. Rupendra Brahambhatt, Interesting Engineering, 7 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 21 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)
Last Updated: - Updated example sentences
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