air conditioning

American  

[air kuhn-dish-uh-ning] / ˈɛər kənˈdɪʃ ə nɪŋ /

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.

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air conditioning British  

noun

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

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Other Word Forms

• air conditioner
  noun
• air-conditioning
  adjective

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Etymology

Origin of air conditioning

First recorded in 1905–10

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Example Sentences

See Examples For:

air conditioning

These reductions are significant because chlorofluorocarbons and other ozone-depleting compounds were once common in refrigerators, air conditioning systems, building insulation, and other everyday products.

From Science Daily ● Nov. 11, 2026

She said heatwaves and drought could push up power costs as people use air conditioning more, and lower water levels reduce hydropower generation.

From Barron's ● Nov. 4, 2026

But it would hardly make a dent in the cost of air conditioning, for which he recommends at least a 3,000- to 4,000-watt kit.

From Los Angeles Times ● Oct. 27, 2026

He jacked up the air conditioning and hit the gas.

From The Wall Street Journal ● Oct. 15, 2026

The building had central air conditioning; what we had to do was find the main air shaft and explore it.

From "Mrs. Frisby and the Rats of NIMH" by Robert C. O'Brien

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