radiant, definition
raÂ·diÂ·ant. adj. 1. Emitting heat or light: a radiant star. 2. Consisting of or emitted as radiation: radiant heat. 3. Filled with light shining especially as rays; brightly shining: a radiant morning. See Synonyms at bright. 4. a. Showing or expressing vitality or joy: radiant eyes; a radiant smile.