Definition of "triumvir" [tri•um•vir]

• One of three men sharing public administration or civil authority in ancient Rome. (noun)
• One of three people sharing public administration or civil authority. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Reportedly Phillips was sandbagged, gulled into believing that ex-HP CEO Mark Hurd was going to come into Oracle as some kind of triumvir alongside him and his fellow president"
• "Eveh tr’Anierh was what, in the language she had recently begun practicing to think in again after a brief hiatus, would have been called a triumvir."
• "a "triumvir," joined the senators in planning his ruin."