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.
With less water vapor in the air, less heat is trapped at night, leading to cooler mornings. Mary Wasson, Austin American Statesman, 30 July 2025 The Caribbean and the Atlantic Ocean are source regions for atmospheric water vapor in the central and eastern U.S. Jeffrey Basara, The Conversation, 24 July 2025 With more water vapor in the air, rainstorms bring more rain in shorter periods of time. Laura Schifter, Time, 15 July 2025 And although Mars isn’t exactly humid, there is some water vapor in the air, so streaks formed by wet cascades should occur mostly in slopes with higher humidity. Phil Plait, Scientific American, 10 July 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 21 Aug. 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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