What is the meaning of Radiant?

Radiating light and/or heat.

Emitted as radiation.

Beaming with vivacity and happiness.

Strikingly beautiful.

Emitting or proceeding as if from a center.

Giving off rays.

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

A point source from which radiation is emitted.

The apparent origin, in the night sky, of a meteor shower.

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

present participle of radier

third-person plural present active indicative of radiō

radiant

Source: wiktionary.org