from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Emitting heat or light.
  • adj. Consisting of or emitted as radiation: radiant heat.
  • adj. Filled with light; bright.
  • adj. Glowing; beaming. See Synonyms at bright.
  • n. An object or a point from which light or heat rays are emitted.
  • n. Astronomy The apparent celestial origin of a meteoric shower.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Radiating light and/or heat.
  • adj. Emitted as radiation.
  • adj. Bright, glowing or filled with light.
  • n. A point source from which radiation is emitted.
  • n. The apparent origin, in the night sky, of a meteor shower.
  • n. A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Emitting or proceeding as from a center; resembling rays; radiating; radiate.
  • adj. Especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor.
  • adj. Beaming with vivacity and happiness.
  • adj. Giving off rays; -- said of a bearing
  • adj. Having a raylike appearance, as the large marginal flowers of certain umbelliferous plants; -- said also of the cluster which has such marginal flowers.
  • adj. Emitted or transmitted by radiation.
  • n. The luminous point or object from which light emanates; also, a body radiating light brightly.
  • n. A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.
  • n. The point in the heavens at which the apparent paths of shooting stars meet, when traced backward, or whence they appear to radiate.

from The Century Dictionary and Cyclopedia

  • Darting, shooting, or emitting rays of light or heat; shining; sparkling: beaming with brightness, literally or figuratively: as, the radiant sun; a radiant countenance.
  • Giving out rays; proceeding in the form of rays; resembling rays; radiating; also, radiated; radiate: as, radiant heat.
  • In heraldry:
  • Edged with rays: said of an ordinary or other bearing such as is usually bounded with straight lines, the rays generally appearing like long indentations. See ray, 8.
  • Giving off rays, which do not form a broken or indented edge to the bearing, but stream from it, its outline being usually perfect and the rays apparently streaming from behind it.
  • In botany, radiating; radiate.
  • Synonyms Beaming, resplendent. See radiance.
  • n. In optics, a luminous point or object from which light radiates to the eye, or to a mirror or lens; a point considered as the focus of a pencil of rays.
  • n. In astronomy, the point in the heavens from which the shooting-stars of a meteoric shower seem to proceed: thus, the radiant of the shower of November 13th is near the star ζ Leonis, and these meteors are hence called the Leonides.
  • n. In geometry, a ray conceived as revolving about its starting-point.
  • n. A substance that emits rays, specifically N-rays.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. radiating or as if radiating light


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English, from Latin radiāns, radiant-, present participle of radiāre, to radiate; see radiate.


  • We may also render the sentence as follows, — “I fell by the radiant rampart, (ffin)” the epithet _radiant_ having a reference to the arms of the soldiers.

    Y Gododin A Poem of the Battle of Cattraeth

  • Benedict said that "for all the shame we feel over our failings" the world must not forget what he called radiant examples of faith such as John Paul.

    The Seattle Times

  • This energy source was discovered by Nicola Tesla, which he called radiant energy, and observed that this energy behaved much like a gas. - Business News

  • Dr. Osterman accidentally gets locked inside an intrinsic field test chamber where he is bathed in radiant light then vaporized.

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  • Like sword edge drawn from sheath in radiant line.

    The Book of The Thousand Nights And A Night

  • GREEN TEA WASH is enriched with the most prized ceremonial green tea, potent anti-oxidants, licorice to soothe and essential amino acids to cleanse, this gentle wash leaves skin radiant and harmonious.

    Leaf and Rusher Medical Skin Care Clinic – Unequalled Expertise in the MedSpa World

  • Four years older than he, she had the Julian look: golden hair, eyes with blue in them, high cheekbones, a lovely mouth, and an expression of radiant calmness that drew people to her.

    Antony and Cleopatra

  • She could see it in her face, in the expression of radiant pleasure that glowed like firelight in her eyes.


  • It is commonly called radiant heat; invisible radiant heat.

    The Wave Theory of Light

  • What we call radiant heat is simply transverse wave-motion, propagated with enormous velocity through an ocean of subtle ethereal matter which bathes the atoms of all visible or palpable bodies and fills the whole of space, extending beyond the remotest star which the telescope can reach.

    The Unseen World, and Other Essays


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  • A modified emerald gem cut developed, patented, and trademarked by Henry Grossbard of the Radiant Cut Diamond Company (RCDC) in 1977--the first such diamond cut with brilliance and fire similar to that of a round brilliant diamond. When the patent expired, this cut became a fully accepted diamond shape in the jewelry business.

    September 24, 2007