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Definition of “air” - Learner’s Dictionary

air

noun     /r/
GAS [U]
A2 the mixture of gases around the Earth that we breathe: air pollution He went outside to get some fresh air (= clean, cool air).Specific chemicals, chemical compounds and gasesSubstances and structures in the bodyTypes of chemical
the air
B2 the space above and around things: He fired his gun into the air.The Earth and outer space - general words
TRAVEL [U]
A2 travel in an aircraft: I like travelling by air. air safetyAviationTravelling by aircraftMovement through the air
QUALITY [no plural]
a particular appearance or quality: He has an air of authority.Seeming and purporting to beFaking and pretending
be on air
to be broadcasting on television or radioBroadcasting in general
→  See also a breath of fresh air , mid-air , clear the air , disappear/vanish into thin air , be up in the air
(Definition of air noun from the Cambridge Learners Dictionary © Cambridge University Press)
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