Source : Webster's Revised Unabridged Dictionary (1913)

Ken \Ken\, n. t. [imp. & p. p. {Kenned}; p. pr. & vb. n.
   {Kenning}.] [OE. kennen to teach, make known, know, AS.
   cennan to make known, proclaim, or rather from the related
   Icel. kenna to know; akin to D. & G. kennen to know, Goth.
   kannjan to make known; orig., a causative corresponding to
   AS. cunnan to know, Goth. kunnan. [root]45. See {Can} to be
   able, {Know}.]
   1. To know; to understand; to take cognizance of. [Archaic or
      Scot.]

   2. To recognize; to descry; to discern. [Archaic or Scot.]
      ``We ken them from afar.'' --Addison

            'T is he. I ken the manner of his gait. --Shak.

Kenning \Ken"ning\, n. [See {Ken}, v. t.]
   1. Range of sight. [Obs.] --Bacon.

   2. The limit of vision at sea, being a distance of about
      twenty miles.

Source : WordNet®

ken
     n 1: range of what one can know or understand; "beyond my ken"
          [syn: {cognizance}]
     2: the range of vision; "out of sight of land" [syn: {sight}]
     [also: {kent}, {kenning}, {kenned}]

kenning
     n : conventional metaphoric name for something, used especially
         in Old English and Old Norse poetry

kenning
     See {ken}