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.
According to the National Oceanic and Atmospheric Administration, atmospheric rivers are streams in the atmosphere that carry water vapors outside of the tropics. Don Sweeney, Sacbee.com, 19 Dec. 2025 An atmospheric river is a band of water vapor that flows through the Earth's atmosphere and dramatically impacts the amount of rain and snow that falls. Janet Loehrke, USA Today, 19 Dec. 2025 Hydrogen reactions also produce ozone and stratospheric water vapor, both greenhouse gases, and can even influence cloud formation. Neetika Walter, Interesting Engineering, 17 Dec. 2025 The team found that molecules such as silicon monoxide, water vapor, and aluminum monoxide appear exactly where clumpy dust clouds were seen in the VLT data. Robert Lea, Space.com, 11 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 22 Dec. 2025.

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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