Term Bight Definition 1) A loop of rope used to tie a knot, or 2) a knot tied to make a stable loop in a rope. Contributor Ferdinand Tretter Score Score of 3.0 from 1 reviews. How would you rate this item? - - VOTE!! - - 1 Star 2 Star 3 Star 4 Star 5 Star (Best) Click here to report possible copyright violations.