American English

Definition of air conditioning noun from the Oxford Advanced American Dictionary

 

air conditioning

 noun
noun
 
[uncountable] (abbreviation AC, a/c)
 
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a system that cools and dries the air in a building or car Is the air conditioning on?
air-conditioned
 
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adjective air-conditioned offices The restaurant is fully air-conditioned.
See the Oxford Advanced Learner's Dictionary entry: air conditioning