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water vapour

British  

noun

  1. water in the gaseous state, esp when due to evaporation at a temperature below the boiling point Compare steam

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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As the Sun heats the ground, the water vapour suddenly condenses.

From Barron's Jul. 27, 2026

As the air rises, it cools and the water vapour condenses into a cloud.

From BBC Jul. 27, 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

Hydrogen has often been touted as an environmentally-friendly future fuel because when burned the only by-product is water vapour.

From BBC Apr. 21, 2026

Without the sun's heat, we should have no water vapour in the atmosphere; without vapour, no clouds; without clouds, no snow; without snow, no glaciers.

From The History of the European Fauna by Robert Francis Scharff

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