wink

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To close and open the eyelid of one eye deliberately, as to convey a message, signal, or suggestion.
• intransitive verb To close and open the eyelids of both eyes; blink.
• intransitive verb To shine fitfully; twinkle.
• intransitive verb To close and open (an eye or the eyes) rapidly.
• intransitive verb To signal or express by winking.
• noun The act of winking.
• noun A signal or hint conveyed by winking.
• noun The very brief time required for a wink; an instant.
• noun A quick closing and opening of the eyelids; a blink.
• noun A gleam or twinkle.
• noun Informal A brief period of sleep.

from The Century Dictionary.

• noun A periwinkle. See periwinkle, and first quotation under wash, n., 13.
• noun A quick shutting and opening of the eyelids; especially, such a movement of one eye made as a signal; hence, a hint, insinuation, command, etc., conveyed by or as by winking.
• noun A nap; sleep.
• noun The time required for winking once; a very short space of time; a moment: referring usually to sleep.
• noun A twinkle; a sparkle; a flash.
• To close and open the eyelids quickly; of the eyes, to be opened and shut quickly; blink; nictitate.
• To shut the eyes; close the eyelids so as not to see.
• To be wilfully blind or ignorant; avoid notice or recognition, as of an annoying or troublesome fact; ignore; connive: often followed by at.
• To close the eyes in sleep; sleep.
• To convey a hint, wish, insinuation, etc., by a quick shutting and opening usually of one eye.
• To twinkle; shine with quick, irregular gleams; flash; sparkle.
• To close and open quickly: as, to wink the eyelids or the eyes.
• To move, force, or remove by winking: as, to wink back one's tears.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb colloq. To cause (the eyes) to wink.
• intransitive verb obsolete To nod; to sleep; to nap.
• intransitive verb To shut the eyes quickly; to close the eyelids with a quick motion.
• intransitive verb To close and open the eyelids quickly; to nictitate; to blink.
• intransitive verb To give a hint by a motion of the eyelids, often those of one eye only.
• intransitive verb To avoid taking notice, as if by shutting the eyes; to connive at anything; to be tolerant; -- generally with at.
• intransitive verb To be dim and flicker.
• intransitive verb (Zoöl.) the white-nosed monkey (Cersopithecus nictitans).
• noun The act of closing, or closing and opening, the eyelids quickly; hence, the time necessary for such an act; a moment.
• noun A hint given by shutting the eye with a significant cast.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb obsolete, intransitive To close one's eyes.
• verb archaic, intransitive To turn a blind eye.
• verb intransitive To blink with only one eye as a message, signal, or suggestion.
• verb intransitive To twinkle.
• verb transitive To send an indication of agreement by winking.
• noun An act of winking (a blinking of only one eye), or a message sent by winking.
• noun A brief time; an instant.
• noun A brief period of sleep; especially forty winks.
• noun A disc used in the game of tiddlywinks.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb gleam or glow intermittently
• verb force to go away by blinking
• noun a reflex that closes and opens the eyes rapidly
• verb briefly shut the eyes