a cloud of solid or liquid particles in a gas
"The sudden gust of wind dispersed the invisible aerosol of pollen floating above the field into the humid air."
a dispenser that holds a substance under pressure and that can release it as a fine spray (usually by means of a propellant gas)
"He reached for an aerosol to clean the grease off his grill grates."
A mixture of fine solid particles or liquid droplets suspended in a gaseous medium.
"The scientist collected aerosols from the smokestack to analyze the fine solid particles and liquid droplets suspended in the air."
To spray with an aerosol.
"The janitor used an aerosol to clean the sticky residue off the windowpane."