Tyrant of Syracuse from 406 to 367 B.C.; at first a private citizen; early took interest in public affairs, and played a part in them; entered the army, and rose to be head of the State; subdued the other cities of Sicily, and declared war against Carthage; was attacked by the Carthaginians, and defeated them three times over; concluded a treaty of peace with them, and spent the rest of his reign, some 20 years, in maintaining and extending his territory; was distinguished, it is said, as he might well be, both as a poet and a philosopher; tradition represents him as in perpetual terror of his life, and taking every precaution to guard it from attack.