ra ‧ di ‧ ant /ˈreɪdiənt/ BrE AmE adjective
[ Date: 1400-1500 ; Language: Latin ; Origin: present pasticiple of radiare ; ⇨ ↑ radiate ]
1 . 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.
a radiant smile
radiant with
They were both radiant with happiness.
2 . [only before noun] literary very bright:
a lovely day with clear blue skies and radiant sun
3 . [only before noun] technical radiant heat or energy is sent out in the form of waves
—radiantly adverb :
She looked radiantly beautiful.