RhymeZone: muniment definitions

Definitions of muniment:

noun: (chiefly law) A deed, or other official document kept as proof of ownership or rights or privileges; an archived document.
noun: (obsolete, in the plural) Things which a person or place is equipped with; effects, furnishings, accoutrements.
noun: (obsolete) Something used as a defence.

(Definitions from Wiktionary)