/ Dictionary / Index V vireo: Meaning and Definition of Find definitions for: vir•e•o Pronunciation: (vir'ē-ō"), [key] — pl. vir•e•os. any of several small, insectivorous American birds of the family Vireonidae, having the plumage usually olive-green or gray above and white or yellow below. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: vireo (Thesaurus) viremia virescence Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language