The Collaborative International Dictionary of English v.0.48:

Ken \Ken\, v. t. [imp. & p. p. Kenned (k[e^]nd); 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.]
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   2. To recognize; to descry; to discern. [Archaic or Scot.]
      "We ken them from afar." --Addison
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            'T is he. I ken the manner of his gait. --Shak.
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The Collaborative International Dictionary of English v.0.48:

Kenning \Ken"ning\, n. [See Ken, v. t.]
   1. Range of sight. [Obs.] --Bacon.
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   2. The limit of vision at sea, being a distance of about
      twenty miles.
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WordNet (r) 3.0 (2006):

kenning
    n 1: conventional metaphoric name for something, used especially
         in Old English and Old Norse poetry