A Quick and Simple Dictionary

sigh

1. Noun.  A deep and prolonged audible inspiration or respiration of air, as when fatigued, frustrated, grieved, or relieved; the act of sighing.
2. Noun.  Figuratively, a manifestation of grief; a lament.
3. Noun.  (Cockney rhyming slang) A person who is bored.
4. Verb.  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.
5. Verb.  Hence, to lament; to grieve.
6. Verb.  To make a sound like sighing.
7. Verb.  To exhale (the breath) in sighs.
8. Verb.  To utter sighs over; to lament or mourn over.
9. Verb.  To express by sighs; to utter in or with sighs.
10. Verb.  To express frustration.
11. Interjection.  An expression of fatigue, exhaustion, grief, sorrow, frustration, or the like, often used in casual written contexts.