air conditioning

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.

Origin:
1905–10

air-con·di·tion·ing, adjective
Dictionary.com Unabridged

air-con·di·tion

[air-kuhn-dish-uhn]
verb (used with object)
1.
to furnish with an air-conditioning system.
2.
to treat (air) with such a system.

Origin:
1930–35

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To air conditioning
00:10
Air conditioning is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
air-condition
 
vb
(tr) to apply air conditioning to

air conditioning
 
n
a system or process for controlling the temperature and sometimes the humidity and purity of the air in a house, etc
 
air conditioner
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
If one is using air conditioning, then incandescent lights contribute to
  cooling costs.
Air conditioning units between rows of equipment help improve cooling
  efficiency in this simulation.
Central air conditioning and better access for handicapped users are other
  long-overdue improvements.
Second, the interior is much hotter, which means more air conditioning.
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