1. king of Persia who expanded the Persian Empire and invaded Greece but was defeated at the battle of Marathon (550-486 BC); [syn: Darius I, Darius the Great]
WordNet (r) 3.0 (2006):
Darius I
n 1: king of Persia who expanded the Persian Empire and invaded
Greece but was defeated at the battle of Marathon (550-486
BC) [syn: Darius I, Darius the Great]