DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Birlaw \Bir"law\, n. [See By-law.] (Law)
      A law made by husbandmen respecting rural affairs; a rustic
      or local law or by-law. [Written also byrlaw, birlie,
      birley.]
      [1913 Webster]