Definition of commercials:
(adj) :
Of or pertaining to commerce.
(n) :
An advertisement in a common media format, usually radio or television.
(n) :
(finance) A commercial trader, as opposed to an individual speculator.
(adj) :
(aviation) Designating an airport that serves passenger and/or cargo flights.
(adj) :
(aviation) Designating such an airplane flight.
(n) :
(slang) A male prostitute.