noun
A device that circulates fresh air and expels stale or noxious air.
(medicine) A machine that moves breathable air into and out of the lungs of a patient who is unable to breathe sufficiently.
(figurative) Some behaviour or happening that relieves a tense atmosphere or situation.
(obsolete, slang) A play or an actor so bad as to empty the theater.
Mac + Safari
iPhone + iPad
Google Chrome
Mozilla Firefox
Opera
Microsoft Edge