Source : Webster's Revised Unabridged Dictionary (1913)

Granny \Gran"ny\, n.
   A grandmother; a grandam; familiarly, an old woman.

   {Granny's bend}, or {Granny's knot} (Naut.), a kind of
      insecure knot or hitch; a reef knot crossed the wrong way.

Source : WordNet®

granny
     n 1: the mother of your father or mother [syn: {grandma}, {grandmother},
           {grannie}, {gran}]
     2: an old woman
     3: a reef knot crossed the wrong way and therefore insecure
        [syn: {granny knot}]