/ Dictionary / Index P petunia: Meaning and Definition of Find definitions for: pe•tu•nia Pronunciation: (pi-'nyu, -nē-u, -ty'-), [key] — n. any garden plant belonging to the genus Petunia, of the nightshade family, native to tropical America, having funnel-shaped flowers of various colors. a deep, reddish purple. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: petunia (Thesaurus) petulant petuntse 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