air conditioning
Americannoun
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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.
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an air-conditioning system or unit.
noun
Other Word Forms
Derived Forms
Etymology
Origin of air conditioning
First recorded in 1905–10
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
HCFCs and HFCs have been widely used in refrigeration and air conditioning systems.
From Science Daily • Jun. 9, 2026
On days that aren’t too hot, they turn on a dashboard fan to help with ventilation rather than crank up the air conditioning, which burns fuel.
From The Wall Street Journal • Jun. 2, 2026
And finally, they’ll examine why the UK and Europe are still so resistant to air conditioning despite being plagued by deadly heatwaves.
From Slate • May 30, 2026
Sandra Evans, who manages Bryn Seiont Newydd nursing home in Caernarfon, said they were "very fortunate" to have air conditioning in communal areas.
From BBC • May 20, 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
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
