/ Dictionary / Index R radiant: Meaning and Definition of Find definitions for: ra•di•ant Pronunciation: (rā'dē-unt), [key] — adj. emitting rays of light; shining; bright: the radiant sun; radiant colors. bright with joy, hope, etc.: radiant smiles; a radiant future. emitted or propagated by radiation. noting a partition line having a series of flamelike indentations formed by ogees joined in zigzags; rayonny. (of a charge, as an ordinary) having an edge or edges so formed. —n. a point or object from which rays proceed. the point in the heavens from which a shower of meteors appears to radiate. a refractory absorbing and radiating heat from the flames of a gas fireplace or the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: radiant (Thesaurus) radiancy radiant emittance 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