A more thorough explanation:

Definition: Muniments of title refer to deeds and other written evidence of property title. This includes all means of evidence which a landowner can use to defend title to a property including deeds, wills, and court judgments through which particular land title passes.

For example, if someone owns a piece of land, they may have a deed that proves they own it. This deed is a muniment of title because it is a written evidence of their property title.

Another definition: Muniment of Title is an action to probate a will in an expedited manner. It asks a court to prove the validity of a will but it does not include an estate administration. It is an option in situations where a person dies testate (with a will) and their estate owes no unpaid debt, except for debt secured by a lien on real estate or if for another reason, there is no need for the court to appoint an executor to administer the estate.

For example, if someone dies and leaves a will, their family may choose to use Muniment of Title to prove the validity of the will and transfer property to the beneficiaries without going through a full administration of the estate.