Source : Webster's Revised Unabridged Dictionary (1913)

Buggery \Bug"ger*y\, n. [OF. bougrerie, bogrerie, heresy. See
   {Bugger}.]
   Unnatural sexual intercourse; sodomy.

Source : WordNet®

buggery
     n : anal intercourse committed by a man with a man or woman
         [syn: {sodomy}, {anal sex}, {anal intercourse}]