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 vapor

British Dictionary definitions for vapor

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 vapor

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 vapor

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.