All 3 Uses of

magistrate
in
The Crucible

That there were some jokers, however, is indicated by the practice of appointing a two-man patrol whose duty was to "walk forth in the time of God's worship to take notice of such as either lye about the meeting house, without attending to the word and ordinances, or that lye at home or in the fields without giving good account thereof, and to take the names of such persons, and to present them to the magistrates, whereby they may be accordingly proceeded against."†
p. 5.0

magistrates = judges or civil authorities who conduct a court

They've sent four judges out of Boston, she says, weighty magistrates of the General Court, and at the head sits the Deputy Governor of the Province.†
p. 52.5

The magistrate sits in your heart that judges you.†
p. 55.4 *

magistrate = judicial official

Definition:

a judge or judicial official

The exact meaning of magistrate varies widely depending upon the context. For example:

in the U.S. federal court: assists district court judges by handling minor offenses or administrative tasks such as preliminary hearings (often referred to as a magistrate judge rather than just a magistrate)
in some U.S. states: a judge in the state court
in France, Belgium, Italy, the Netherlands, and other civil law countries: a sitting magistrate is a judge and a standing magistrate is a prosecutor
in England: may be a volunteer without formal legal training who performs a judicial role with regard to minor matters
in ancient Rome: a powerful officer with both judicial and executive power