/ Dictionary / Index R radiancy: Meaning and Definition of Find definitions for: ra•di•an•cy Pronunciation: (rā'dē-un-sē), [key] — pl. -cies. radiance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: radiancy (Thesaurus) radiance radiant Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language