To air out is to let fresh air through a room. Air out the bedroom, air out after painting.
Ten minutes with two windows open does more than an hour with one, since the air needs somewhere to go. To air out a room in winter costs less heat than people fear.
1phraseair outTo let fresh air through a room.
“Open both windows and air out the whole flat for ten minutes.”
air out is a phrase.
Practised in Cleaning & Housework