Source : Webster's Revised Unabridged Dictionary (1913)

Ligament \Lig"a*ment\ (l[i^]g"[.a]*ment), n. [L. ligamentum, fr.
   ligare to bind: cf. F. ligament. Cf. {Lien}, n., {Ligature}.]
   1. Anything that ties or unites one thing or part to another;
      a bandage; a bond. --Hawthorne.

            Interwoven is the love of liberty with every
            ligament of your hearts.              --Washington.

   2. (Anat.)
      (a) A tough band or plate of dense, fibrous, connective
          tissue or fibrocartilage serving to unite bones or
          form joints.
      (b) A band of connective tissue, or a membranous fold,
          which supports or retains an organ in place; as, the
          gastrophrenic ligament, connecting the diaphragm and
          stomach.

Source : WordNet®

ligament
     n 1: a sheet or band of tough fibrous tissue connecting bones or
          cartilages or supporting muscles or organs
     2: any connection or unifying bond