n. A substitute (usually of a person, position or role).n. A person or animal that acts as a substitute for the social or pastoral role of another, such as a surrogate mother.n. A deputy for a bishop in granting licences for marriage.n. : A judicial officer of limited jurisdiction, who administers matters of probate and intestate succession and, in some cases, adoptions.n. A surrogate or surrogate key is a unique identifier for either an entity in the modeled world or an object in the database.n. Any of a range of Unicode codepoints which are used in pairs in UTF-16 to represent characters beyond the Basic Multilingual Plane.adj. Of, concerning, relating to or acting as a substitute.v. To replace or substitute something with something else; appoint a successor.