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WordReference Random House Learner's Dictionary of American English © 2024ra•di•ant /ˈreɪdiənt/USA pronunciation adj. - [before a noun] giving off rays of light;
shining;
bright. - bright with joy, hope, etc.:a radiant smile.
- Physicsgiven off or sent out by radiation:[before a noun]radiant energy; radiant heat.
ra•di•ant•ly, adv. WordReference Random House Unabridged Dictionary of American English © 2024ra•di•ant (rā′dē ənt),USA pronunciation adj. - emitting rays of light;
shining;
bright:the radiant sun; radiant colors. - bright with joy, hope, etc.:radiant smiles; a radiant future.
- Physicsemitted or propagated by radiation.
- Heraldry
- 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.
- Astronomythe point in the heavens from which a shower of meteors appears to radiate.
- Energya refractory absorbing and radiating heat from the flames of a gas fireplace or the like.
- Latin radiant- (stem of radiāns, present participle of radiāre to radiate light, shine), equivalent. to radi(us) beam, ray (see radius) + -ant- -ant
- late Middle English 1400–50
- 1.See corresponding entry in Unabridged beaming, refulgent, resplendent. See bright.
- 1.See corresponding entry in Unabridged dim.
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