From Longman Dictionary of Contemporary Englishvapourva‧pour British English, vapor American English /ˈveɪpə $ -ər/ ●○○ noun [countable, uncountable]HP a mass of very small drops of a liquid which float in the air, for example because the liquid has been heated → evaporation water vapour
Examples from the Corpus
vapour• Thus, at various stages in the column the descending liquid and the ascending vapour are in equilibrium.• It was inflated with liquid rubber monomer under its own vapour pressure.• We had to staple a polythene vapour barrier to the rafters of a pitched roof.• At a distance, the figures of Lucier and Izzie stood like souls in purgatory, chest-deep in the seething vapour.• The swept vapour screen may be best employed for 3-D computer displays and component visualisation.• The vapour might condense and fall on the slopes as a new sort of lubricant snow.• The vapour of his breath feathered in a trail behind him as he moved through the cold bushes towards the stream.• Or will more water vapour feed the warming process? 