noun, plural tri·ar·chies.

government by three persons.
a set of three joint rulers; a triumvirate.
a country divided into three governments.
a group of three countries or districts, each under its own ruler.

Origin of triarchy

First recorded in 1595–1605, triarchy is from the Greek word triarchía triumvirate. See tri-, -archy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for triarchy

Historical Examples of triarchy

British Dictionary definitions for triarchy


noun plural -chies

government by three people; a triumvirate
a country ruled by three people
an association of three territories each governed by its own ruler
any of the three such territories
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012