a bishop of the first class, who superintends the conduct of other bishops. Archbishops were not known in the east till about the year 320; and though there were some soon after this, who had the title, yet it was only a personal honour, by which the bishops of considerable cities were distinguished. It was not till of late that archbishops because metropolitans, and had suffragans under them. Athanasius appears to have been the first who used the title archbishop, which he gave occasionally to his predecessor. Gregory Nazianzen, in like manner, gave it to Athanasius; not that either of them was entitled to any jurisdiction, or even any precedency, in virtue of this title. Among the Latins, Isidore Hispalensis is the first who speaks of archbishops.

Bibliography Information
Watson, Richard. Entry for 'Archbishop'. Richard Watson's Biblical & Theological Dictionary. https://www.studylight.org/dictionaries/eng/wtd/a/archbishop.html. 1831-2.

Bible Dictionaries Archbishop

Watson's Biblical & Theological Dictionary

Bible Dictionaries
Archbishop