American English

Definition of radiant adjective from the Oxford Advanced American Dictionary



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  1. 1showing great happiness, love, or health a radiant smile The bride looked radiant. radiant with something She was radiant with health.
  2. 2giving a warm bright light The sun was radiant in a clear blue sky.
  3. 3[only before noun] (technology) sent out in rays from a central point the radiant heat/energy of the sun
adverb radiantly happy He smiled radiantly.
See the Oxford Advanced Learner's Dictionary entry: radiant