Source : Webster's Revised Unabridged Dictionary (1913)

Kipper \Kip"per\, n. [D. kippen to hatch, snatch, seize. Cf.
   {Kipe}.]
   1. (Zo["o]l.) A salmon after spawning.

   2. A salmon split open, salted, and dried or smoked; -- so
      called because salmon after spawning were usually so
      cured, not being good when fresh. [Scot.]

   {Kipper time}, the season in which fishing for salmon is
      forbidden. [Eng. & Scot.]