Webster's Revised Unabridged Dictionary · 1913

Magistrate

Magistrate , noun

[Latin magistratus, from magister master: compare French magistrat. See Master.]

A person clothed with power as a public civil officer; a public civil officer invested with the executive government, or some branch of it.
All Christian rulers and magistrates. — Book of Com. Prayer
Of magistrates some also are supreme, in whom the sovereign power of the state resides; others are subordinate. — Blackstone