To nod; to sleep; to nap.

To shut the eyes quickly; to close the eyelids with a
quick motion.

To close and open the eyelids quickly; to nictitate; to
blink.

To give a hint by a motion of the eyelids, often those of
one eye only.

To avoid taking notice, as if by shutting the eyes; to
connive at anything; to be tolerant; – generally with at.

To be dim and flicker; as, the light winks.

To cause (the eyes) to wink.

The act of closing, or closing and opening, the eyelids
quickly; hence, the time necessary for such an act; a moment.

A hint given by shutting the eye with a significant cast.