Webster's Revised Unabridged Dictionary · 1913

Tragedy

Tragedy , noun

[Old English tragedie, Old French tragedie, French tragédie, Latin tragoedia, Greek {not transcribed}, from {not transcribed} a tragic poet and singer, originally, a goat singer; {not transcribed} a goat (perhaps akin to {not transcribed} to gnaw, nibble, eat, and English trout) + {not transcribed} to sing; from the oldest tragedies being exhibited when a goat was sacrificed, or because a goat was the prize, or because the actors were clothed in goatskins. See Ode.]

1.
A dramatic poem, composed in elevated style, representing a signal action performed by some person or persons, and having a fatal issue; that species of drama which represents the sad or terrible phases of character and life.
Tragedy is to say a certain storie, As olde bookes maken us memorie, Of him that stood in great prosperitee And is yfallen out of high degree Into misery and endeth wretchedly. — Chaucer
All our tragedies are of kings and princes. — Jer. Taylor
tragedy is poetry in its deepest earnest; comedy is poetry in unlimited jest. — Coleridge
2.
A fatal and mournful event; any event in which human lives are lost by human violence, more especially by unauthorized violence.