The Oxford Thesaurus An A-Z Dictionary of Synonyms - radiant adj.

1) shining, bright, beaming, burning, ablaze, blazing, brilliant, luminous, resplendent, splendid, splendorous, lustrous, gleaming, glowing, phosphorescent, shimmering, shiny, glossy, glistening, incandescent, alight, effulgent, refulgent, sparkling, dazzling, glittering, coruscating, scintillating, twinkling; aglow: In her hair she wore a diamond tiara, a radiant crown whose glory was diminished only by her beauty. The room was radiant with sunshine. 2) happy, overjoyed, ecstatic, rapturous, delighted, joyful, blithe, blithesome, blissful, beatific, glad, gleeful, joyous, gay, bubbling, bubbly, jubilant, elated, rhapsodic, exultant, exhilarated, in seventh heaven, in heaven, Colloq on cloud nine, Brit over the moon: Carrie was absolutely radiant when she learned she was pregnant.