oceanic Syllabification: (o·ce·an·ic)Pronunciation: /ˌōSHēˈanik/Definition of oceanic adjective 1of or relating to the ocean:oceanic atolls of or inhabiting the part of the ocean beyond the edge of a continental shelf:stocks of oceanic fish (of a climate) governed by the proximity of the ocean. of enormous size or extent; huge; vast:an oceanic failure 2 (Oceanic) of or relating to Oceania:a gallery specializing in Oceanic artoceanic in other Oxford dictionaries Definition of oceanic in the British & World English dictionary