Definition of RADIANT

having or being an outward sign of good feelings (as of love, confidence, or happiness) <she left the interview with a radiant smile on her face, confident she had gotten the job> <a radiant bride>
Near Antonyms blank, flat, listless, stoic (or stoical), unemotional; black, dark, darkening, depressing, dismal, gloomy, glum, gray (also grey), melancholy, sullen; frowning, glaring, glowering, lowering (also louring), scowling

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