Milesian /mʌɪˈliːzɪən/noun 4adjective 2forms 3 noun4 •a follower of the Milesian school of philosophy founded by Thales •(historical) a native or inhabitant of the ancient city of Miletus in Asia Minor. •A member of a people in Irish mythology, the descendants of Míl Espáine. •(humorous, old-fashioned) An Irishman; someone of Irish origin. adjective2 •Pertaining to Miletus or its inhabitants. •Pertaining to Milesius or his people; Irish.My father was the youngest son of a numerous family, all Irish, sprung from a very ancient and honourable stock, being of Milesian descent […] . — 1808 formsMilesians · more Milesian · most Milesian