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

Legionnaires’ is a flu-like malady caused by inhaling water vapor infected with Legionella bacteria. John O'connor, The Seattle Times, "Audit: Slow Legionnaires’ response at Illinois veterans home," 25 Mar. 2019 This instrument images the Earth at a number of different wavelengths, including the visible portion of the spectrum as well as infrared wavelengths that help detect clouds and water vapor content. Scott K. Johnson, Ars Technica, "Newest NOAA weather satellite suffers critical malfunction," 23 May 2018 In the meantime, here's a quiz from the book: Question: Why is water vapor condensing onto only one of the windows? Ryan D'agostino, Popular Mechanics, "Can You Solve This Architectural Conundrum?," 20 Dec. 2017 Scientists believe that most of the water consumed at subduction zones gets expelled as water vapor during volcanic eruptions. Jill Kiedaisch, Popular Mechanics, "Earth’s Crust Is Swallowing Way More Ocean Than We Thought," 15 Nov. 2018 Varanasi said one of the next steps is how to capture the rest of the water escaping from the cooling towers, which escapes in the form of invisible water vapor. Martin Finucane, BostonGlobe.com, "MIT says new system captures water in fog," 8 June 2018 Every temperature profile, also known as a sounding, is sensitive to temperature and water vapor. David Grossman, Popular Mechanics, "The Polar Vortex Looks Absolutely Chilling From Space," 1 Feb. 2019 If a plume were erupting, Jia says, the erupted water vapor and dust particles would be affected by magnetic fields, which is what the spacecraft detected. National Geographic, "Water Geysers Likely Found on This 'Alien' Ice Moon," 14 May 2018 Mini science lesson: Humidity is the amount of water vapor that’s in the air. Korin Miller, SELF, "Here’s Why You Are So Freaking Dry When You Get Off a Plane," 14 Sep. 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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Statistics for water vapor

Last Updated

21 Apr 2019

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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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