Source : Webster's Revised Unabridged Dictionary (1913)

Bight \Bight\ (b[imac]t), n. [OE. bi[yogh]t a bending; cf. Sw. &
   Dan. bugt bend, bay; fr. AS. byht, fr. b[=u]gan. [root]88.
   Cf. {Bout}, {Bought} a bend, and see {Bow}, v.]
   1. A corner, bend, or angle; a hollow; as, the bight of a
      horse's knee; the bight of an elbow.

   2. (Geog.) A bend in a coast forming an open bay; as, the
      Bight of Benin.

   3. (Naut.) The double part of a rope when folded, in
      distinction from the ends; that is, a round, bend, or coil
      not including the ends; a loop.

Source : WordNet®

bight
     n 1: a loop in a rope
     2: a bend or curve (especially in a coastline)
     3: a broad bay formed by an indentation (a bight) in the
        shoreline; "the Bight of Benin"; "the Great Australian
        Bight"
     4: the middle part of a slack rope (as distinguished from its
        ends)

bight
     v : fasten with a bight