Hidatsa hidation • hidden · · · Info · Definitions · Characters · · Hidatsa · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a member of the Sioux people formerly inhabiting an area along the Missouri river in western North Dakota. Synonyms: Gros Ventre. · · Noun Definition 1 (noun) a Siouan language spoken by the Hidatsa. Synonyms: Gros Ventre. · · Noun Definition 2 Characters · · H latin capital letter h U+0048 a latin small letter a U+0061 d latin small letter d U+0064 i latin small letter i U+0069 s latin small letter s U+0073 t latin small letter t U+0074