/ Dictionary / Index C Caddo: Meaning and Definition of Find definitions for: Cad•do Pronunciation: (kad'ō), [key] — pl. -dos, -do a member of any of several North American Indian tribes formerly located in Arkansas, Louisiana, and eastern Texas, and now living in Oklahoma. the Caddoan language of the Caddo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: caddo (Thesaurus) caddisworm Caddoan Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language