Blink is defined as means to open and close or turn on and off quickly, especially the eyelids.(verb)
An example of blink is to rapidly close and open the eyelids.
The definition of a blink is a quick opening and closing of the eyes, or an on and off flash of light.(noun)
See blink in Webster's New World College Dictionary
Origin: ME blenken, blenchen: see blench
See blink in American Heritage Dictionary 4
verb blinked, blink·ing, blinks verb, intransitive
Origin: Probably Middle English blinken, to move suddenly
Origin: , variant of blenchen; see blench1.
Learn more about blink