Definition of "water vapour" []

• Alternative spelling of water vapor. (noun)

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• "Re-breathing water vapour would go some small way to postponing the time when the mucous linings of nose and throat would dry raw."
• "Cooled by the night, the water vapour in the hot air trapped in the hole condensed into visible water droplets, which formed on the cold unporous plastic, trickled downhill to the weighted point, and dripped from there into the cup."