water vapor


Definition of water vapor 

: 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

And that upward boost means more water vapor turns to raindrops. Scott K. Johnson, Ars Technica, "Houston’s cityscape squeezed extra rain out of Hurricane Harvey," 16 Nov. 2018 Larger storms and heavier downpours are both strong signals because higher sea surface temperatures mean more water vapor will be absorbed by the atmosphere. Alissa Walker, Curbed, "Hurricane Florence will dump up to 50 percent more rainfall due to climate change," 13 Sep. 2018 Both of the Class 8 trucks use technology from the Toyota Mirai hydrogen fuel cell car and emit only water vapor as emissions. Gary Gastelu, Fox News, "Toyota unveils second-generation hydrogen-powered semi truck," 31 July 2018 There are also small amounts of argon, carbon dioxide, other gases, and water vapor. Caroline Picard, Good Housekeeping, "Can You Ace This 5th Grade Science Test?," 29 Aug. 2018 Particulate matter can be directly emitted into the air by cars, trucks, buses, factories, construction sites, and wood burning, but particles may also be formed in the air when gases from burning fuels react with sunlight and water vapor. Korin Miller, SELF, "How to Stay Safe When Your City’s Air Quality Is Dangerous," 21 Aug. 2018 During the reaction, hydrogen and oxygen combine to produce electrical energy and harmless water vapor as a byproduct. Avery Thompson, Popular Mechanics, "Where Are All the Hydrogen Cars?," 10 Aug. 2018 More water vapor fuels more ice crystal growth, which means shinier clouds. Rachel Becker, The Verge, "How to capture the eerie nighttime clouds of climate change," 6 July 2018 If a plume vented water vapor from the moon, some of the water’s constituent hydrogen and oxygen would become charged by being stripped of electrons by the radiation belts that surround Jupiter. Ramin Skibba, Scientific American, "Decades-Old Data Unveils Plumes Spewing from Europa," 14 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'water vapor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of water vapor

15th century, in the meaning defined above

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Last Updated

1 Dec 2018

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Time Traveler for water vapor

The first known use of water vapor was in the 15th century

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More Definitions for water vapor

water vapor


Medical Definition of water vapor 

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)

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a nest or breeding place

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