n. One who sits by another; hence, one who shares another's position, rank, or dignity; an associate in office.n. An inferior officer of justice, who sits to assist a judge as a law authority; in Scotland, the legal adviser of a magistrate, with judicial powers.n. In England, a person chosen to assist the mayor and aldermen of a borough in matters concerning elections.n. In some universities, as the Scotch, the title of the elected members of the university court or supreme governing body of the university.n. One appointed to make assessments, especially for purposes of taxation.