mu·ni·ment 
(mynə-mənt)
(mynə-mənt)n.
1. often muniments Law Documentary evidence by which one can defend a title to property or a claim to rights.
2. Archaic A means of defense or protection.
[Middle English, from Old French, from Medieval Latin mūnīmentum, from Latin, defense, protection, from mūnīre, to fortify; see MUNITION.]