Source : Webster's Revised Unabridged Dictionary (1913)

Cocktail \Cock"tail`\, n.
   1. A beverage made of brandy, whisky, or gin, iced, flavored,
      and sweetened. [U. S.]

   2. (Stock Breeding) A horse, not of pure breed, but having
      only one eighth or one sixteenth impure blood in his
      veins. --Darwin.

   3. A mean, half-hearted fellow; a coward. [Slang, Eng.]

            It was in the second affair that poor little Barney
            showed he was a cocktail.             --Thackeray.

   4. (Zo["o]l.) A species of rove beetle; -- so called from its
      habit of elevating the tail.

Source : WordNet®

cocktail
     n 1: a short mixed drink
     2: an appetizer served as a first course at a meal

Source : Free On-Line Dictionary of Computing

Cocktail
     
        {GMD Toolbox for Compiler Construction}