Entry 1 sense Webster, 1913 Sturionian · Stu·ri·o·ni·an · IPA /ˌst(j)ʊɹɪˈoʊ.ni.ən/ 01 n. One of the family of fishes of which the sturgeon is the type. 1. One of the family of fishes of which the sturgeon is the type.(Zool.)