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general::
Phrase(s): air out [for something]
to remain in the fresh air and become fresher. • The pillows are airing out on the balcony., Phrase(s): air something out
to freshen something up by placing it in the open air; to freshen a room by letting outside air move through it. • I’ll have to air out the car. Someone has been smoking in it.
McGrawhill's American Idioms And Phrasal Verbs