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1. Physical Chem.a system of colloidal particles dispersed in a gas; smoke or fog.
2. 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.
3. See aerosol bomb.
of or containing a liquid or gas under pressure for dispensing as a spray or foam: a deodorant available in aerosol cans.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.