1. magna charta - Noun
3. Magna charta - Proper noun
The great Charter, so called, obtained by the English barons from King John, A. D. 1215. This name is also given to the charter granted to the people of England in the ninth year of Henry III., and confirmed by Edward I.
Hence, a fundamental constitution which guaranties rights and privileges.
Source: Webster's dictionaryMagna Charta is the recommended spelling in German-language literature. Source: Internet