a rapid change in brightness; a brief spark or flash emit or reflect light in a flickering manner; "Does a constellation twinkle more brightly than a single star?
If you say that someone's eyes twinkle, you mean that their face expresses good humour or amusement. She saw her mother's eyes twinkle with amusement. Twinkle is also a noun. A kindly twinkle came into her eyes
emit or reflect light in a flickering manner; "Does a constellation twinkle more brightly than a single star?"
{f} sparkle, produce a flickering light; (usually of the eyes) to be bright with pleasure or joy; move quickly and lightly on one's feet; blink, wink (Archaic)