Source : Webster's Revised Unabridged Dictionary (1913)

Although \Al*though"\, conj. [All + though; OE. al thagh.]
   Grant all this; be it that; supposing that; notwithstanding;
   though.

         Although all shall be offended, yet will not I. --Mark
                                                  xiv. 29.

   Syn: {Although}, {Though}.

   Usage: Although, which originally was perhaps more emphatic
          than though, is now interchangeable with it in the
          sense given above. Euphonic consideration determines
          the choice.

Source : WordNet®

although
     adv : despite the fact that; "even though she knew the answer, she
           did not respond" [syn: {though}, {tho'}]