From The Collaborative International Dictionary of English v.0.48 [gcide]:
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.
[1913 Webster]
2. (Geog.) A bend in a coast forming an open bay; as, the
Bight of Benin.
[1913 Webster]
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.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
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 in the shoreline; "the
Bight of Benin"; "the Great Australian Bight"
4: the middle part of a slack rope (as distinguished from its
ends)
v 1: fasten with a bight