Entry 1 sense Webster, 1913 Interoceanic · In·ter·o·ce·an·ic · IPA /ˌɪntəɹˌoʊʃiˈænɪk/ 01 a. Between oceans; connecting oceans; as, interoceanic communication; an interoceanic canal. 1. Between oceans; connecting oceans; as, interoceanic communication; an interoceanic canal.