Added 9 October 2026 vapour noun Categories: NatureActionsUncommon Words noun ! Definition from Wiktionary (CC BY-SA). More about vapour at Wordnik → Where our words come from → British standard spelling of vapor. verb British standard spelling of vapor. Related Words: vaporisationvaporizationvaporevaporationevaporativegaseoussteammistmoisturefumeporegas Back to today's word