View synonyms for radiant


[ rey-dee-uhnt ]


  1. emitting rays of light; shining; bright:

    the radiant sun;

    radiant colors.

    Synonyms: resplendent, refulgent, beaming

    Antonyms: dim

  2. bright with joy, hope, etc.:

    radiant smiles;

    a radiant future.

  3. Physics. emitted or propagated by radiation.
  4. Heraldry.
    1. noting a partition line having a series of flamelike indentations formed by ogees joined in zigzags; rayonny.
    2. (of a charge, as an ordinary) having an edge or edges so formed.


  1. a point or object from which rays proceed.
  2. Astronomy. 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.


/ ˈreɪdɪənt /


  1. sending out rays of light; bright; shining
  2. characterized by health, intense joy, happiness, etc

    a radiant countenance

  3. emitted or propagated by or as radiation; radiated

    radiant heat

  4. sending out heat by radiation

    a radiant heater

  5. physics (of a physical quantity in photometry) evaluated by absolute energy measurements Compare luminous

    radiant flux

    radiant efficiency


  1. a point or object that emits radiation, esp the part of a heater that gives out heat
  2. astronomy the point in space from which a meteor shower appears to emanate


/ dē-ənt /


  1. Transmitting light, heat, or other radiation. Stars, for example, are radiant bodies.
  2. Consisting of or transmitted as radiation.


  1. The apparent celestial origin of a meteor shower. For example, a point in the constellation Gemini is the radiant of the Geminid meteor shower.

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Derived Forms

  • ˈradiantly, adverb

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Other Words From

  • radi·ant·ly adverb
  • anti·radi·ant adjective
  • non·radi·ant adjective
  • non·radi·ant·ly adverb
  • super·radi·ant adjective
  • un·radi·ant adjective

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Word History and Origins

Origin of radiant1

First recorded in 1400–50; late Middle English, from Latin radiant-, stem of radiāns “shining,” present participle of radiāre “to radiate light, shine,” verb derivative of radius “beam, ray”; radius

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Word History and Origins

Origin of radiant1

C15: from Latin radiāre to shine, from radius ray of light, radius

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Synonym Study

See bright.

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Example Sentences

In the 21st century, he writes, “the future is not a radiant horizon guiding our advancing steps, but rather a line of shadow drawing closer.”

Each block would come with a built in table and chairs as well as radiant heating.

From Fortune

There were enclosed vertical grills with radiant heat, hibachis from post-occupation Japan, and the Skotch Grill, a portable barbecue with a red tartan design that looked like an ice bucket.

From Eater

It’s dark, but in many lakes, a tiny percentage of the sun’s radiant energy can get through the ice, and that’s enough to sustain photosynthesis and life, even though there’s only four months of polar summer.

The ensuing merriment steered the curiosity of Amaterasu, who finally came out of her cave, and thus the world was once again covered in radiant sunlight.

John Paul was youthful in his sixties with a radiant charisma.

Bulbs strung among branches in the overhead wild hibiscus tree form a radiant canopy.

He taught her how to die by slow example, and she was radiant with the privilege.

McDonald is a radiant talent, with a warm voice and beaming smile that light up any venue in which she appears.

And so again and again he pitted his own radiant confidence against some equal and opposite force.

The clear and radiant sky was drowned in a quivering radiance of gold, that was like a thing alive and sensitively palpitating.

On the following afternoon he found her, for instance, radiant with that exuberant happiness he had learned now to distrust.

Fresh and radiant she looked once more, no sign of tears, no traces of her recent emotion anywhere.

But he only noted that she appeared well and radiant; he understood her no morethan he understood several other things.

But after all, a radiant peace settled upon her when she at last found herself alone.


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radiancyradiant efficiency