Definition of aerosols:
(n) :
A mixture of fine solid particles or liquid droplets suspended in a gaseous medium.
(n) :
(physics) A colloidal system in which the dispersed phase is composed of either solid or liquid particles and in which the dispersal medium is some gas, usually air.
(n) :
The payload (e.g. insecticide, paint, oil, cosmetics) and propellant contained by an aerosol can.
(n) :
An aerosol can.
(v) :
(transitive) To spray with an aerosol.