Ardiaean adjective 1noun 1forms 3 adjective1 •Pertaining to the Ardiaei.This shows the main Roman concern in the region—to protect Italian merchants in the Stratis of Otranto from Ardiaean piracy. — 2012 noun1 •A member of the Ardiaei nation.The first named Illyrian "king" was Pleuratus II, an Ardiaean, who reigned from 260–250 BC. — 2023 formsArdiaeans · more Ardiaean · most Ardiaean