To inhale a larger quantity of air than usual, and immediately expel it; to make a deep single audible respiration, especially as the result or involuntary expression of fatigue, exhaustion, grief, sorrow, frustration, or the like.
an utterance made by exhaling audibly
a sound like a person sighing; "she heard the sigh of the wind in the trees"
heave or utter a sigh; breathe deeply and heavily; "She sighed sadly"
