muniment

Documentary evidence by which one can defend a title to property or a claim to rights.

A means of defense or protection.

A fortification of any kind; a stronghold; a place of defense.

Support; defense.

A document by which claims and rights are defended or maintained; a title-deed; a deed, charter, record, etc., especially such as belong to public bodies, or those in which national, manorial, or ecclesiastical rights and privileges are concerned.