/ Dictionary / Index A avifauna: Meaning and Definition of Find definitions for: a•vi•fau•na Pronunciation: (ā"vu-fô'nu, av"u), [key] — n. the birds of a given region, considered as a whole. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: avifauna (Thesaurus) avidya avigation Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language