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to exhale. Now, breathe out, then breathe in. The doctor told me to breathe out slowly.
breathe something out
to exhale something. At last, he breathed his last breath out, and that was the end. Breathe out your breath slowly.
1. To exhale: Breathe out slowly, and you will relax more easily.
2. To expel something from the lungs by exhaling: I closed my eyes and breathed out a sigh. The yoga instructor told everyone to take a big breath, hold it for ten seconds, and then breathe it out.