Sur"ro*gate (?), n. [L. surrogatus, p. p. of surrogare, subrogare, to put in another's place, to substitute; sub under + rogare to ask, ask for a vote, propose a law. See Rogation, and cf. Subrogate.] 1. A deputy; a delegate; a substitute.

2. The deputy of an ecclesiastical judge, most commonly of a bishop or his chancellor, especially a deputy who grants marriage licenses. [Eng.]

3. In some States of the United States, an officer who presides over the probate of wills and testaments and yield the settlement of estates.

Sur"ro*gate (?), v. t. To put in the place of another; to substitute. [R.] Dr. H. More.

Sur"ro*gate (?), n. [L. surrogatus, p. p. of surrogare, subrogare, to put in another's place, to substitute; sub under + rogare to ask, ask for a vote, propose a law. See Rogation, and cf. Subrogate.] 1. A deputy; a delegate; a substitute.

2. The deputy of an ecclesiastical judge, most commonly of a bishop or his chancellor, especially a deputy who grants marriage licenses. [Eng.]

3. In some States of the United States, an officer who presides over the probate of wills and testaments and yield the settlement of estates.

Sur"ro*gate (?), v. t. To put in the place of another; to substitute. [R.] Dr. H. More.

• A substitute (usually of a person, position or role).
  
• A person or animal that acts as a substitute for the social or pastoral role of another, such as a surrogate mother.
  
• (Chiefly British) A deputy for a bishop in granting licences for marriage.
  
• In some US states, including New York, a judge who has power over the settlement of wills, estates and other legal affairs.
  
• (normally a modifier of the noun) Of, concerning, relating to or acting as a substitute.
  
• replace or substitute something with something else; appoint a successor.