To extinguish a flame by blowing air onto it. She leaned over the cake to blow out the candles.
To burst or rupture, especially a tire, due to excessive pressure or damage. The car swerved when the front tire blew out on the highway.
To defeat an opponent by a large margin. The home team blew out their rivals with a score of 10-0.
To expel air forcefully from the mouth. He blew out a deep breath after hearing the good news.