/ Dictionary / Index R rayonny: Meaning and Definition of Find definitions for: ray•on•ny Pronunciation: (rā'u-nē), [key] — adj. Heraldry. radiant (def. 4). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rayon Rayside-Balfour Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language