| Noun | 1. | breathing out - the act of expelling air from the lungsbreath - the process of taking in and expelling air during breathing; "he took a deep breath and dived into the pool"; "he was fighting to his last breath" blow, puff - forceful exhalation through the nose or mouth; "he gave his nose a loud blow"; "he blew out all the candles with a single puff" wind - breath; "the collision knocked the wind out of him" | |