1. (n.) A person appointed to act for another; a deputy; a substitute; as, a surrogate parent\.

2. (n.) The deputy of an ecclesiastical judge, most commonly of a bishop or his chancellor, especially a deputy who grants marriage licenses.

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

4. (v. t.) To put in the place of another; to substitute.

advocate agent alter ego alternate alternative amicus curiae analogy attorney backup backup man champion change changeling comparison copy counterfeit deputy double dummy equal equivalent ersatz exchange executive officer exponent fake father figure father image figurehead fill-in ghost ghostwriter imitation lieutenant locum locum tenens makeshift metaphor metonymy mother figure mother surrogate next best thing paranymph personnel phony pinch hitter pleader procurator proxy relief replacement representative reserves ringer second in command second string secondary sign spares stand-in sub substituent substitute substitution succedaneum superseder supplanter symbol synecdoche third string token understudy utility man utility player vicar vicar general vice vice-president vice-regent vicegerent