/ Dictionary / Index R rara avis: Meaning and Definition of Find definitions for: ra•ra a•vis Pronunciation: (râr'u ā'vis Lat. rä'rä ä'wis), [key] — pl. ra•rae a•ves a rare person or thing; rarity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. raptus rare Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language