vapour

[ vey-per ]
/ ˈveɪ pər /

noun, verb (used with or without object) Chiefly British.

Usage note

See -or1.

Definition for vapour (2 of 2)

vapor

[ vey-per ]
/ ˈveɪ pər /

noun

verb (used with object)

to cause to rise or pass off in, or as if in, vapor; vaporize.
Archaic. to affect with vapors; depress.

verb (used without object)

Also especially British, va·pour.

Origin of vapor

1325–75; Middle English vapour < Latin vapor steam

Related forms

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for vapour

British Dictionary definitions for vapour (1 of 2)

vapour

US vapor

/ (ˈveɪpə) /

noun

verb

to evaporate or cause to evaporate; vaporize
(intr) to make vain empty boasts; brag

Derived Forms

Word Origin for vapour

C14: from Latin vapor

British Dictionary definitions for vapour (2 of 2)

vapor

/ (ˈveɪpə) /

noun

the US spelling of vapour
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

Medicine definitions for vapour

vapor

[ vāpər ]

n.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for vapour

vapor

[ vāpər ]

The gaseous state of a substance that is normally liquid or solid at room temperature, such as water that has evaporated into the air. See more at vapor pressure. See also water vapor.
A faintly visible suspension of fine particles of matter in the air, as mist, fumes, or smoke.
A mixture of fine droplets of a substance and air, as the fuel mixture of an internal-combustion engine.

Related forms

vaporize verb
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.