/ Dictionary / Index W wilco: Meaning and Definition of Find definitions for: wil•co Pronunciation: (wil'kō), [key] — interj. (esp. in radio transmission) an indication that the message just received will be complied with. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Wilburite Wilcox Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language