over /ˈəʊvə/ prep directly above; on the top of; via the top or upper surface of: over one's head on or to the other side of: over the river during; through, or throughout (a period of time) in or throughout all parts of: to travel over England throughout the whole extent of: over the racecourse above; in preference to: I like that over everything else by the agency of (an instrument of ...
That slightly open mouth while concentrating. The subtle parting of lips during sleep. The tendency to breathe through your mouth instead of your nose during exercise. These seemingly innocent habits ...