/ Dictionary / Index C cheero: Meaning and Definition of Find definitions for: cheer•o Pronunciation: (chēr'ō), [key] — pl. cheer•os. cheerio. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cheerly cheery Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language