- (a.) A Roman governor of the fourth part of a province; hence, any subordinate or dependent prince; also, a petty king or sovereign.
- (a.) Four.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). tetrarch. Retrieved September 20, 2026, from http://smartdefine.org/tetrarch/definitions/2071599 |
| Chicago | Webster's. 2011. "tetrarch" http://smartdefine.org/tetrarch/definitions/2071599 (accessed September 20, 2026). |
| Harvard | Webster's 2011, tetrarch, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/tetrarch/definitions/2071599>. |
| MLA | Webster's. "tetrarch" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/tetrarch/definitions/2071599> |