muniments, Law. a document, as a title deed or a charter, by which rights or privileges are defended or maintained.
2.
Archaic. a defense or protection.
Origin: 1375–1425; late Middle English < Medieval Latin mūnīmentum document (e.g., title, deed) for use in defense against a claimant, Latin: defense, protection, orig., fortification, equivalent to mūnī(re) to fortify + -mentum-ment