Source : Webster's Revised Unabridged Dictionary (1913)

Beldam \Bel"dam\ Beldame \Bel"dame\, n. [Pref. bel-, denoting
   relationship + dame mother: cf. F. belledame fair lady, It.
   belladonna. See {Belle}, and {Dame}.]
   1. Grandmother; -- corresponding to belsire.

            To show the beldam daughters of her daughter.
                                                  --Shak.

   2. An old woman in general; especially, an ugly old woman; a
      hag.

            Around the beldam all erect they hang. --Akenside.

Source : WordNet®

beldam
     n 1: an ugly evil-looking old woman [syn: {hag}, {beldame}, {witch},
           {crone}]
     2: a woman of advanced age [syn: {beldame}]