·adj Four.
II. Tetrarch ·adj A Roman governor of the fourth part of a province; hence, any subordinate or dependent prince; also, a petty king or sovereign.
governor of a fourth part ...
Hitchcock's Bible Names Dictionary
Strictly the ruler over the fourth part of a province; but the word denotes a ruler of a province ge...
Easton's Bible Dictionary
properly the sovereign or governor of the fourth part of a country. (Matthew 14:1; Luke 3:1; 9:7; Ac...
William Smith's Bible Dictionary