Ionic /aɪˈɒnɪk/adjective 3noun 1forms 1 adjective3 •of an order of classical Greek architecture whose distinguishing feature is a capital with spiral volutes. •Synonym of Ionian; of or relating to Ionia or the Ionians •(old-fashioned) Of or relating to a kind of heavy-faced type. noun1 •A four-syllable metrical unit of light-light-heavy-heavy (‿ ‿ — —) that occurs in Ancient Greek and Latin poetry. formsIonics