/ Dictionary / Index W Waco: Meaning and Definition of Find definitions for: Wa•co Pronunciation: (wā'kō), [key] — n. a city in central Texas, on the Brazos River. 101,261. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: waco (Thesaurus) wacky wad Related Content Daily Word Quiz: banshee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language