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.
Both these methods consume much energy, either to cool surfaces so water vapor condenses or pry water molecules off sorbents through heat and pressure. Shi En Kim, AZCentral.com, 26 Jan. 2026 As that ice particle falls, more and more minuscule bits of water vapor freezes to it. Laura Kiniry, Popular Science, 22 Jan. 2026 More bad news The total amount of water vapor in the air is still increasing. Mark Gongloff, Mercury News, 17 Jan. 2026 Their system uses MOFs, known as metal-organic frameworks (MOFs), which are known for capturing and releasing water vapor efficiently. Atharva Gosavi, Interesting Engineering, 16 Jan. 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 2 Feb. 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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