to burn or shine with an unsteady light that goes on and off quickly:
The overhead lights flickered momentarily.
2 [always + adverb/preposition]
if an emotion or expression flickers on someone's face or through their mind, it exists or is shown for only a short time
flicker across/through/on etc
A puzzled smile flickered across the woman's face.
to quickly make a sudden small movement or series of movements:
Polly's eyelids flickered, then she slept.