Magistrate n. : A person clothed with power as a public civil officer; a public civil officer invested with the executive government, or some branch of it.

Example:
What is a Magistrate Judge and how is it different from a regular Judge?

Taxonomy
magistrates, judge, Executive, court, County Magistrates, jurisdiction, Judicial Magistrates, magistrate judges, chief magistrate, Magistrates' court, states, judicial magistrate, counties, Justice of the Peace, executive powers, Federal Magistrates, District Magistrates, powers.

Defination from the web:
magistrate is a judicial officer; in ancient Rome, the word magistratus denoted one of the highest government officers with judicial and executive powers. Today, in common law systems, a magistrate has limited law enforcement and administration authority. ...