Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
Wiktionary
n. A machine that is used to control temperature and humidity in an enclosed space.
WordNet
n. a system that keeps air cool and dry [syn: air conditioning]
Usage examples of "air conditioner".
The air conditioner's compressor hissed and gurgled in the sudden silence.
He gestured for me to get in his car and then had the decency to turn up the air conditioner, aim all the vents at me, and offer no comments about the sticky wet blotches all over my shirt.
And there was a note on the table, held down against the air conditioner breeze by a Coors can.
She had turned off the air conditioner, and the odor of her Shalimar and musk was strong in the small room, but not unpleasantly so.
She started the engine and turned on the air conditioner, but didn't put the car in gear.
Dozens of air conditioner ducts also criss-crossed the room –.
Dozens of air conditioner ducts also criss-crossed the room - the cooling systems were necessary to keep the massive computers from overheating and catching fire.
He came in after her and turned on an air conditioner in the room's blue-curtained window.
Andur revved his engine a little, as if the air conditioner compressor had come on, to underscore his eagerness to get on the road.
She opened windows and turned on the ceiling fans to get some of the hot air out of the house before she turned on the air conditioner to cool things even more.
He stopped a twenty-something guy who had a black-lipsticked girl hanging on him like a window-unit air conditioner.