intermural

from WordNet (r) 3.0 (2006)

intermural
    adj 1: between two or more institutions etc; "an intermural
           track meet"

from The Collaborative International Dictionary of English v.0.48

Intermural \In`ter*mu"ral\, a.
   1. Lying between walls; inclosed by walls.
      [1913 Webster]

   2. Taking place between two different institutions or cities;
      as, an intermural soccer match between two schools.
      [PJC]