n. [ L. tetrarches, Gr. &unr_;, &unr_;; te`tra- (see Tetra-) + &unr_; a ruler, &unr_; to lead; rule: cf. F. tétrarque. See Arch, a. ] (Rom. Antiq.) A Roman governor of the fourth part of a province; hence, any subordinate or dependent prince; also, a petty king or sovereign. [ 1913 Webster ]

a. Four. [ Obs. ] Fuller. [ 1913 Webster ]

n. [ Cf. F. tétrarchat. ] (Rom. Antiq.) A tetrarchy. [ 1913 Webster ]

a. [ Gr. &unr_;. ] Of or pertaining to a tetrarch or tetrarchy. Bolingbroke. [ 1913 Webster ]

n.; pl. Tetrarchies [ L. tetrarchia, Gr. &unr_;: cf. F. tétrarchie. ] (Rom. Antiq.) The district under a Roman tetrarch; the office or jurisdiction of a tetrarch; a tetrarchate. [ 1913 Webster ]