adj, noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   A governor or ruler of a quarter of a country, especially of a fourth part of a province in or client state of Ancient Rome.
2. 2
   Each of the four members of a jointly ruling tetrarchy, notably of the Roman Empire since Diocletian.
3. 3
   An officer in charge of a fourth part of a phalanx in Ancient Greece.

Adjective

1. 1
   Having four vascular strands in a fibrovascular cylinder or stele. not-comparable

Synonyms

All synonyms

beychiefchieftaincollectorcrowned headdynast

Etymology

Borrowed from Latin tetrarchēs, from Ancient Greek τετράρχης (tetrárkhēs), from τετρα- (tetra-, “four”) + -άρχης (-árkhēs, “ruler, leader”).

Related phrases

ancient greeceancient rome

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.