Definitions from Wiktionary ( )

▸ verb:  (obsolete, intransitive) To close one's eyes in sleep.
▸ verb:  (intransitive) To close one's eyes.
▸ verb:  (intransitive) Usually followed by at: to look the other way, to turn a blind eye.
▸ verb:  (intransitive) To close one's eyes quickly and involuntarily; to blink.
▸ verb:  (transitive, intransitive) To blink with only one eye as a message, signal, or suggestion, usually with an implication of conspiracy. (When transitive, the object may be the eye being winked, or the message being conveyed.)
▸ verb:  (intransitive) To gleam fitfully or intermitently; to twinkle; to flicker.
▸ noun:  An act of winking (a blinking of only one eye), or a message sent by winking.
▸ noun:  A brief period of sleep; especially forty winks.
▸ noun:  A brief time; an instant.
▸ noun:  The smallest possible amount.
▸ noun:  A subtle allusion.
▸ noun:  (tiddlywinks) Synonym of tiddlywink (“small disc used in the game of tiddlywinks”)
▸ noun:  (chiefly British, slang) Synonym of periwinkle (“type of mollusk”)

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