An Etymological Dictionary of Astronomy and Astrophysics

1. A civil officer charged with the administration of the law.
   

2. A minor judicial officer, as a justice of the peace or the judge of a police court, having jurisdiction to try minor criminal cases and to conduct preliminary examinations of persons charged with serious crimes (Dictionary.com).

Etymology (EN): M.E., from O.Fr. magistrat, from L. magistratus “a magistrate, public functionary,” from magistrare “to serve as a magistrate,” from magister, “chief, director,” → master.

Etymology (PE): Dâdyâr, from dâd, → justice,

• yâr, “assistant, helper,” → gravity assist.