Definition of "radiant" in English

adjective

1. Radiating light and/or heat.

   • the radiant sun

2. Emitted as radiation.

3. (figurative) Beaming with vivacity and happiness.

   • a radiant face

4. (figurative) Strikingly beautiful.

5. Emitting or proceeding as if from a center.

6. (heraldry, of a bearing) Giving off rays.

   • the sun radiant
   • a crown radiant

7. (botany) Having a ray-like appearance, like the large marginal flowers of certain umbelliferous plants; said also of the cluster which has such marginal flowers.

noun

1. A point source from which radiation is emitted.

2. (astronomy) The apparent origin, in the night sky, of a meteor shower.

3. (geometry) A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.