Ponca pon • ponce · · · Info · Definitions · Characters · · Ponca · · Text Latin · · Script 5 · · Length Definitions · · · (noun) a member of the Siouan people of the Missouri river valley in northeastern Nebraska. Synonyms: Ponka. · · Noun Definition 1 (noun) the Dhegiha dialect spoken by the Ponca. Synonyms: Ponka. · · Noun Definition 2 Characters · · P latin capital letter p U+0050 a latin small letter a U+0061 c latin small letter c U+0063 n latin small letter n U+006E o latin small letter o U+006F