air conditioning

[ air kuhn-dish-uh-ning ]

noun

1. a system or process for controlling the temperature, humidity, and sometimes the purity of the air in an interior, as of an office, theater, laboratory, or house, especially one capable of cooling.
2. an air-conditioning system or unit.

air conditioning

noun

1. a system or process for controlling the temperature and sometimes the humidity and purity of the air in a house, etc

Derived Forms

• air conditioner, noun

Other Word Forms

• air-con·di·tion·ing adjective

Word History and Origins

Origin of air conditioning¹

First recorded in 1905–10