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

Other Word Forms

• air-conditioning adjective
• air conditioner noun

Word History and Origins

Origin of air conditioning¹

First recorded in 1905–10

Example Sentences

It didn’t have central air conditioning, and it was heated by an old-fashioned boiler.

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Residents were told to shut windows and doors, keep pets inside and turn off air conditioning due to air quality concerns.

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Postdoctoral researcher Dr. Mojtaba Zabihi, the study's first author, explains that room configurations and existing heating, ventilation and air conditioning systems can differ widely.

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One woman passed out flyers for a furnished studio in downtown L.A. with air conditioning, a Murphy bed, an in-unit washer and dryer and streaming TV.

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In one wing, where the Global Renewables Alliance had a stand, there wasn’t any air conditioning.

Read more on The Wall Street Journal