Definition of “twinkle” - Learner’s Dictionary

twinkle

verb [ I ] uk us /ˈtwɪŋkl/
LIGHT

If light twinkles, it shines and seems to be quickly flashing on and off:

The lights of the town twinkled in the distance.
EYES

If someone's eyes twinkle, they look bright and happy.

twinkle noun [ C ]

(Definition of “twinkle” from the Cambridge Learner's Dictionary © Cambridge University Press)