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.
Hydrogen combustion releases water vapor instead of greenhouse gas emissions, which is why the Biden administration sees it as a more sustainable alternative to fossil fuels. Justine Calma, The Verge, 6 Jan. 2025 Dense fog forms when the air near the ground cools down to its dew point, the temperature when water vapor condenses into liquid water droplets suspended in the air. Dan Perry, Newsweek, 18 Dec. 2024 Plus, scientists are still studying the effects of events like the January 2022 Tonga volcanic eruption, which introduced vast quantities of water vapor and sulfur dioxide into the atmosphere. Stefanie Waldek, Space.com, 16 Jan. 2025 This analogy captures the atmosphere's ability to absorb a larger and larger amount of water vapor as temperatures increase, and wring out more and more water due to such temperature changes. Andrew Freedman, Axios, 12 Jan. 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

Dictionary Entries Near water vapor

Cite this Entry

“Water vapor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20vapor. Accessed 2 Feb. 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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