|Origin:||, present pasticiple of radiare; RADIATE|
full of happiness and love, in a way that shows in your face and makes you look attractive:
She looked radiant in a white silk dress.
They were both radiant with happiness.
2 [only before noun] literary
a lovely day with clear blue skies and radiant sun
3 [only before noun] technicalTP
radiant heat or energy is sent out in the form of waves
She looked radiantly beautiful.