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The Collaborative International Dictionary
Irenarch

Irenarch \I"re*narch\, n. [L. irenarcha, irenarches, Gr. ?; ? peace + ? to rule.] (Gr. Antiq.) An officer in the Greek empire having functions corresponding to those of a justice of the peace. [Written also eirenarch.]

Wiktionary
irenarch

n. (context historical English) An officer in Ancient Greece having functions corresponding to those of a Justice of the Peace.