D defs.my
Entry 2 senses Webster, 1913

Kenning

/kĕn'-ĭng/ · Ken·ning · IPA /ˈkɛnɪŋ/
01 n. Range of sight.
  1. 1.
    Range of sight.[Obs.]
  2. 2.
    The limit of vision at sea, being a distance of about twenty miles.