Hermionean /hɜːrmaɪ.əˈniːən/adjective 3noun 1forms 1 adjective3 •Of or relating to Hermione of Greek mythology. •Of or relating to the ancient city of Hermione in Argolis in Greece, or of its inhabitants the Hermioneans. •Of or relating to the asteroid 121 Hermione. noun1 •A citizen of the ancient city of Hermione. formsHermioneans