Source : Webster's Revised Unabridged Dictionary (1913)

Intramural \In`tra*mu"ral\, a.
   1. Being within the walls, as of a city.

   2. (Anat. & Med.) Being within the substance of the walls of
      an organ; as, intramural pregnancy.

Source : WordNet®

intramural
     adj : carried on within the bounds of an institution or community;
           "most of the students participated actively in the
           college's intramural sports program" [ant: {extramural}]