a system or process for controlling the temperature and sometimes the humidity and purity of the air in a house, etc
WordReference Random House Learner's Dictionary of American English © 2025
air con•di•tion•ing /ˈɛr kənˌdɪʃənɪŋ/USA pronunciation n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2025- a system for reducing the temperature and humidity of the air in an enclosed space.
air′ condi′tioning,
- 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, esp. one capable of cooling.
- an air-conditioning system or unit.
- 1905–10
Collins Concise English Dictionary © HarperCollins Publishers::
ˈair-conˌdi•tion,
v. [~ + object]
WordReference Random House Unabridged Dictionary of American English © 2025- to furnish with air conditioning.
air-con•di•tion
(âr′kən dish′ən),USA pronunciation v.t.
- to furnish with an air-conditioning system.
- to treat (air) with such a system.
- 1930–35
Collins Concise English Dictionary © HarperCollins Publishers::
- (transitive)
to apply air conditioning to
'air conditioning' also found in these entries (note: many are not synonyms or translations):
AC
- HVAC
- air
- air conditioner
- air-condition
- air-cool
- climate control
- cooling degree-day
- duct
- hang-on
- kick
- legionnaire's disease
- loaded
- stripped
- summerize