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

Word Origin and History for vapour

vapor


n.

late 14c., from Anglo-French vapour, from Latin vaporem (nominative vapor) "exhalation, steam, heat," of unknown origin. Vapors "fit of fainting, hysteria, etc." is 1660s, from medieval notion of "exhalations" from the stomach or other organs affecting the brain.

Online Etymology Dictionary, © 2010 Douglas Harper

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