/'reɪdɪənt; `redɪənt/
adj
1 [attrib 作定语] sending out rays of light; shining brightly 光芒四射的; 光辉灿烂的
*the radiant sun 光辉灿烂的太阳.
2 ~ (with sth) (of a person, his eyes, look, etc) bright with joy, hope or love （指人、人的眼睛、面容等）容光焕发的; 喜形于色的
*a radiant face, smile 容光焕发的脸、喜气洋洋的微笑
* radiant beauty 解颐美人
* She was radiant with joy at her wedding. 她在举行婚礼时喜气洋洋.
* You look absolutely radiant! 你看上去真是满面春风!
3 (physics 物) [attrib 作定语]
(a) transmitting heat or energy by radiation 发出辐射热或能的
*a radiant heater 辐射加热器.
(b) (of heat or energy) transmitted by radiation （指热或能）辐射的.

adj
[Date: 1400-1500; Language: Latin;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.
　a radiant smile
radiant with
　They were both radiant with happiness.
[only before noun]literary
very bright
　a lovely day with clear blue skies and radiant sun
[only before noun]technical
radiant heat or energy is sent out in the form of waves
>radiantlyadv
　She looked radiantly beautiful.