Definition of by air
:by flying in airplanes
- travel by air
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by air
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air
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: breath
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: the mixture of invisible odorless tasteless gases (such as nitrogen and oxygen) that surrounds the earth
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: a light breeze
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: to expose to the air for drying, purifying, or refreshing : ventilate
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: to expose to public view or bring to public notice
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: to transmit by radio or television
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