Pronunciation: (ī-ō'nē-un),[key] —adj. 1. of or pertaining to Ionia.
2. of or pertaining to the branch of the Greek people named from Ion, their legendary founder.
—n. 1. a member of one of the four main divisions of the prehistoric Greeks who invaded the Greek mainland and, after the Dorian invasions, emigrated to the Aegean islands and the coast of Asia Minor. Cf. Achaean (def. 5), Aeolian (def. 2), Dorian (def. 2).
2. an Ionian Greek.