oligarch

[ ol-i-gahrk ]
/ ˈɒl ɪˌgɑrk /

noun

one of the rulers in an oligarchy.

Origin of oligarch

1600–10; < Greek oligárchēs, equivalent to olíg(os) olig- + -archēs -arch
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for oligarch

oligarch

/ (ˈɒlɪˌɡɑːk) /

noun

a member of an oligarchy
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