magistrate

n. civil officer who has the authority to administrate the law; minor judicial officer who has limited jurisdiction in criminal cases (i.e. justice of the peace)

Etymology Derived from Middle English word "magistrat" known since c.1374, "civil officer in charge of administering laws", from Old French magistrat, from Latin "magistratus", from magister "master", itself from contrastive adjective from the adverb magis "more", itself a comparative degree of magnus ("great").
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Noun
1. a public official authorized to decide questions bought before a court of justice
(synonym) judge, justice, jurist
(hypernym) official, functionary
(hyponym) chief justice

n. municipal authorities

n. magistrate, official