Source : Webster's Revised Unabridged Dictionary (1913)

Brothel \Broth"el\, n. [OE. brothel, brodel, brethel, a
   prostitute, a worthless fellow, fr. AS. ber['o]?an to ruin,
   destroy; cf. AS. bre['o]tan to break, and E. brittle. The
   term brothel house was confused with bordel brothel. CF.
   {Bordel}.]
   A house of lewdness or ill fame; a house frequented by
   prostitutes; a bawdyhouse.

Source : WordNet®

brothel
     n : a building where prostitutes are available [syn: {whorehouse},
          {bordello}, {bagnio}, {house of prostitution}, {house of
         ill repute}, {bawdyhouse}, {cathouse}, {sporting house}]