any darkened state of the atmosphere, or the diffused substance that causes it.
Photography. a hazy effect on a developed negative or positive, caused by light other than that forming the image, by improper handling during development, or by the use of excessively old film.
Physical Chemistry. a mixture consisting of liquid particles dispersed in a gaseous medium.
to cover or envelop with or as if with fog: The steam in the room fogged his glasses.
to confuse or obscure: The debate did little else but fog the issue.
to bewilder or perplex: to fog the mind.
Photography. to produce fog on (a negative or positive).
to become enveloped or obscured with or as if with fog.
Photography. (of a negative or positive) to become affected by fog.
- fogless, adjective
- un·fogged, adjective
- un·fog·ging, adjective
Other definitions for fog (2 of 2)
a second growth of grass, as after mowing.
long grass left standing in fields during the winter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use fog in a sentence
The damp air was fogging the lenses, but I kept them to my eyes; for I did not want to look at Davies.The Riddle of the Sands | Erskine Childers
He wasn't a man to follow problems to a conclusion, however, and it simply hung in his mind as a fogging event.The Three Sapphires | W. A. Fraser
Photographers must know that fogging and blurring the image is curtailing the experience of it.Adventures in the Arts | Marsden Hartley
He is none the less magic because he works through one great spell, and not through a host of minor, petti-fogging miracles.God and Mr. Wells | William Archer
Of all developers it is most free from fogging propensities.The Barnet Book of Photography | Various
British Dictionary definitions for fog (1 of 2)
a mass of droplets of condensed water vapour suspended in the air, often greatly reducing visibility, corresponding to a cloud but at a lower level
a cloud of any substance in the atmosphere reducing visibility
a state of mental uncertainty or obscurity
photog a blurred or discoloured area on a developed negative, print, or transparency caused by the action of extraneous light, incorrect development, etc
a colloid or suspension consisting of liquid particles dispersed in a gas
to envelop or become enveloped with or as if with fog
to confuse or become confused: to fog an issue
photog to produce fog on (a negative, print, or transparency) or (of a negative, print, or transparency) to be affected by fog
British Dictionary definitions for fog (2 of 2)
a second growth of grass after the first mowing
grass left to grow long in winter
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
Scientific definitions for fog
A dense layer of cloud lying close to the surface of the ground or water and reducing visibility to less than 1 km (0.62 mi). Fog occurs when the air temperature becomes identical, or nearly identical, to the dew point.
An opaque or semiopaque condensation of a substance floating in a region or forming on a surface.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Other Idioms and Phrases with fog
see in a fog.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.