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1. A rapid change in brightness; a brief spark or flash
   - scintillation, sparkling
    
2. Merriment expressed by a brightness, gleam or animation of countenance
   "there's a perpetual twinkle in his eyes";
   - sparkle, spark, light

1. Gleam or glow intermittently
   "The lights were twinkling";
   - flash, blink, wink, winkle
    
2. (celestial body) emit or reflect light in a flickering manner
   "Does a constellation twinkle more brightly than a single star?";
   - winkle, scintillate
    
3. Show amusement or good humour with the eyes
   - sparkle

Derived forms: twinkled, twinkles, twinkling

Type of: alteration, aspect, beam, change, expression, face, facial expression, look, modification, radiate, shine, verve, vitality

Encyclopedia: Twinkle, the Dream Being