Pronunciation: (rā'dē-unt),[key] —adj. 1. emitting rays of light; shining; bright: the radiant sun; radiant colors. 2. bright with joy, hope, etc.: radiant smiles; a radiant future. 3. Physics.emitted or propagated by radiation.
4. Heraldry. a. noting a partition line having a series of flamelike indentations formed by ogees joined in zigzags; rayonny.
b. (of a charge, as an ordinary) having an edge or edges so formed.
—n. 1. a point or object from which rays proceed.
2. Astron.the point in the heavens from which a shower of meteors appears to radiate.
3. a refractory absorbing and radiating heat from the flames of a gas fireplace or the like.