Wiktionary
vb. 1 (context intransitive English) To exhale. 2 (context transitive English) To exhale (''something'').
WordNet
Usage examples of "breathe out".
I took a deep breath and tried to breathe out hard, to breathe it all away.
He did notice that he tended to seem to breathe out more air than he took in on the way up and wondered what he should do about it.
But after they had gone, and I was alone, I permitted myself to breathe out.
The smoke-darkened timbers seemed to breathe out a miasma of oppressiveness.
Fflur chose that moment to tighten the bandages, and I had to breathe out before I could speak.
I felt his power breathe out around him, fill up that small tight space that was his personal aura.
Beryl drew in a huge breath, drew it into lungs that would breathe out death on Lauranas people.
Breathe in as they arrive, hold the breath as they strike, breathe out as they go?
Breathe in, breathe out, as the fuselage shuddered and the deck jumped beneath his feet.