- a variation of vapor.
vapour
Americannoun
noun
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particles of moisture or other substance suspended in air and visible as clouds, smoke, etc
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a gaseous substance at a temperature below its critical temperature Compare gas
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a substance that is in a gaseous state at a temperature below its boiling point
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rare something fanciful that lacks substance or permanence
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archaic a depressed mental condition believed originally to be the result of vaporous exhalations from the stomach
verb
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to evaporate or cause to evaporate; vaporize
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(intr) to make vain empty boasts; brag
Spelling
See -or 1.
Other Word Forms
Etymology
Origin of vapour
C14: from Latin vapor
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Contrails - also known as vapour trails - are made when the hot exhaust from aircraft engines meets the cold air at high altitude, creating ice crystals.
From BBC ● Aug. 18, 2026
It starts off as a cute little white cloud -- a cumulus cloud, which is formed because water vapour has turned into tiny droplets.
From Barron's ● Jul. 27, 2026
As the Sun heats the ground, the water vapour suddenly condenses.
From Barron's ● Jul. 27, 2026
Instead it turned into a series of unfortunate events - with crisis comms appearing to be hit by its own crisis - leaving behind a vapour trail of confusion.
From BBC ● Jul. 10, 2026
The sun had disappeared above a film of vapour.
From "The BFG" by Roald Dahl
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
