bylaw n[Middle English bilage bilawe local law, probably ultimately from Old Norse bȳr town + lg law]
1 : a rule adopted by an organization chiefly for the government of its members and the management of its affairs
2 : a local ordinance often used in pl.
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.