(1):

(n.) A deputy; a delegate; a substitute.

(2):

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

(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):

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