[ air-uh-sawl, -sol ]
/ ˈɛər əˌsɔl, -ˌsɒl /
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Physical Chemistry. a system of colloidal particles dispersed in a gas and commonly formed as smoke, fog, mist, haze, or smog: a radioactive aerosol;aerosols in the stratosphere.
a liquid substance, as a disinfectant or deodorant, sealed in a metal container under pressure with an inert gas or other activating agent and released as a spray or foam through a push-button valve or nozzle: an aerosol for cleaning ovens.
Physiology, Pathology. a mist that lingers in the air, composed of fine particles (less than 5 micrometers in diameter) that form from the evaporation of respiratory droplets (5–10 micrometers in diameter) released into the air through talking, breathing, singing, whistling, coughing, sneezing, etc.: Recommended precautions against virus-laden aerosols vary according to the type of virus.
of or containing a liquid or gas under pressure for dispensing as a spray or foam: a deodorant available in aerosol cans.
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
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Origin of aerosol

First recorded in 1920–25; aero- + sol4
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use aerosol in a sentence

British Dictionary definitions for aerosol

/ (ˈɛərəˌsɒl) /

a colloidal dispersion of solid or liquid particles in a gas; smoke or fog
a substance, such as a paint, polish, or insecticide, dispensed from a small metal container by a propellant under pressure
Also called: air spray such a substance together with its container

Word Origin for aerosol

C20: from aero- + sol (ution)
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

Medical definitions for aerosol

[ ârə-sôl′ ]

A gaseous suspension of fine solid or liquid particles.
A substance, such as a drug containing therapeutically active ingredients, packaged under pressure with a gaseous propellant for release as a spray of fine particles.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for aerosol

[ ârə-sôl′ ]

A substance consisting of very fine particles of a liquid or solid suspended in a gas. Mist, which consists of very fine droplets of water in air, is an aerosol. Compare emulsion foam.
A liquid substance, such as paint, an insecticide, or a hair spray, packaged under pressure for use or application as a fine spray.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.