The Collaborative International Dictionary of English v.0.48:

Blink \Blink\ (bl[i^][ng]k), v. i. [imp. & p. p. Blinked
   (bl[i^][ng]kt); p. pr. & vb. n. Blinking.] [OE. blenken;
   akin to dan. blinke, Sw. blinka, G. blinken to shine, glance,
   wink, twinkle, D. blinken to shine; and prob. to D. blikken
   to glance, twinkle, G. blicken to look, glance, AS.
   bl[imac]can to shine, E. bleak. [root]98. See Bleak; cf.
   1st Blench.]
   [1913 Webster]
   1. To wink; to twinkle with, or as with, the eye.
      [1913 Webster]

            One eye was blinking, and one leg was lame. --Pope
      [1913 Webster]

   2. To see with the eyes half shut, or indistinctly and with
      frequent winking, as a person with weak eyes.
      [1913 Webster]

            Show me thy chink, to blink through with mine eyne.
                                                  --Shak.
      [1913 Webster]

   3. To shine, esp. with intermittent light; to twinkle; to
      flicker; to glimmer, as a lamp.
      [1913 Webster]

            The dew was falling fast, the stars began to blink.
                                                  --Wordsworth.
      [1913 Webster]

            The sun blinked fair on pool and stream . --Sir W.
                                                  Scott.
      [1913 Webster]

   4. To turn slightly sour, as beer, mild, etc.
      [1913 Webster]