water vapour

British

noun

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

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water vapour

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

From Barron's ● 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

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

From BBC ● Jul. 27, 2026

The colder the air gets the less water vapour it is able to contain.

From BBC ● Mar. 20, 2026

A mass of water vapour was conceived by Dalton as "like a mass of small shot."

From Heroes of Science Chemists by M. M. Pattison (Matthew Moncrieff Pattison) Muir

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023