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
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Relative humidity measures the amount of water vapor in the air relative to the current temperature.
—
Karen Brewer Grossman, Southern Living, 4 Dec. 2025
Alongside the helium, the JWST detected water vapor high in the atmosphere but no methane, suggesting vigorous mixing that brings hotter, methane-poor gas upward.
—Samantha Mathewson, Space.com, 3 Dec. 2025
Because ethanol burns cleanly, producing only water vapor and a small amount of carbon dioxide, these fireplaces are ventless and require no chimney or flue.
—Angie Hicks, Boston Herald, 30 Nov. 2025
Atmospheric rivers are long, narrow regions in the atmosphere—like rivers in the sky—that transport water vapor outside of the tropics, according to the National Oceanic and Atmospheric Administration (NOAA).
—Anna Skinner, MSNBC Newsweek, 24 Nov. 2025
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Karen Brewer Grossman, Southern Living, 4 Dec. 2025
Alongside the helium, the JWST detected water vapor high in the atmosphere but no methane, suggesting vigorous mixing that brings hotter, methane-poor gas upward.
—Samantha Mathewson, Space.com, 3 Dec. 2025
Because ethanol burns cleanly, producing only water vapor and a small amount of carbon dioxide, these fireplaces are ventless and require no chimney or flue.
—Angie Hicks, Boston Herald, 30 Nov. 2025
Atmospheric rivers are long, narrow regions in the atmosphere—like rivers in the sky—that transport water vapor outside of the tropics, according to the National Oceanic and Atmospheric Administration (NOAA).
—Anna Skinner, MSNBC Newsweek, 24 Nov. 2025
See All Example Sentences for water vapor
Cite this Entry
“Water vapor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20vapor. Accessed 8 Dec. 2025.
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