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.
But in some places, such as Southern California and the Costa del Sol in Spain, hot, dry winds sap from the air water vapor that would normally absorb UV radiation, causing more UV exposure. Sanket Jain, Smithsonian Magazine, 16 May 2025 Atmospheric rivers can vary greatly in size and strength, but the weather service says the the average atmospheric river carries an amount of water vapor roughly equivalent to the average flow of water at the mouth of the Mississippi River. John Bacon, USA Today, 15 May 2025 Astronomers have been waiting for such a definitive detection of water ice elsewhere in the universe for decades, based on the previous detections of water vapor out among the stars, as well as where frozen water ice can be found in our own solar system. Ian Randall, MSNBC Newsweek, 15 May 2025 Believe it or not, the West Coast is not the only part of the country that experiences atmospheric rivers, which are narrow plumes of water vapor that originate in more tropical regions. Marshall Shepherd, Forbes.com, 11 May 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 19 May. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!