v.
   - close and open one eye quickly, typically as a signal of affection or greeting or to convey a message.
 - shine or flash intermittently.
 - 
(wink at)
 pretend not to notice (something bad).
 
n.
 an act of winking.
 
  Phrase
  
    - as easy as winking
 informal very easy or easily.  - in the wink of an eye 
(or in a wink)
 very quickly.  - not sleep 
(or get)
 a wink 
(or not get a wink of sleep)
 not sleep at all. 
   
  Derivative
  
  Etymology
  OE wincian ‘close the eyes’, of Gmc origin; rel. to wince1.