Achaean /əˈkiːən/adjective 2noun 2forms 1 adjective2 •Of or relating to Achaea or the Achaeans. •(literary) In Homeric usage, of or relating to Greece, especially of the Mycenaean era. noun2 •An inhabitant or resident of Achaea, especially a member of an ancient Hellenic tribe that inhabited the region of Achaea. •(literary) In Homeric usage, a Greek person, especially of the Mycenaean era. formsAchaeans