term:

Magna Carta

magna carta

or
Mag·na Char·ta
[mag-nə-kÄ r-tə]

n
[Medieval Latin, literally, great charter]
: a charter of liberties signed under duress by King John of England in 1215 that influenced the development of several modern legal and constitutional principles (as due process)

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.