Wordnet 3.0
NOUN (1)
1.
the Greek courtier to Dionysius the Elder who (according to legend) was condemned to sit under a naked sword that was suspended by a hair in order to demonstrate to him that being a king was not the happy state Damocles had said it was (4th century BC);
WordNet (r) 3.0 (2006):
Damocles
n 1: the Greek courtier to Dionysius the Elder who (according to
legend) was condemned to sit under a naked sword that was
suspended by a hair in order to demonstrate to him that
being a king was not the happy state Damocles had said it
was (4th century BC)