UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/traɪˈʌmvə/US:USA pronunciation: respellingUSA pronunciation: respelling(trī umvər)

Inflections of 'triumvir' (nnoun: Refers to person, place, thing, quality, etc.):
nplplural noun: Noun always used in plural form--for example, "jeans," "scissors."
nplplural noun: Noun always used in plural form--for example, "jeans," "scissors."

WordReference Random House Unabridged Dictionary of American English © 2020
tri•um•vir  (trī umvər),USA pronunciation n., pl.  -virs, -vi•ri 
    (trī umvər),USA pronunciation 
  1. Ancient History[Rom. Hist.]one of three officers or magistrates mutually exercising the same public function.
  2. Governmentone of three persons associated in any office or position of authority.
tri•umvi•ral, adj. 
  • Latin: literally, one man of three, back formation from trium virōrum of three men
  • 1570–80

Collins Concise English Dictionary © HarperCollins Publishers::
triumvir /traɪˈʌmvə/ n ( pl -virs, -viri / -vɪˌriː/)
  1. (esp in ancient Rome) a member of a triumvirate
Etymology: 16th Century: from Latin: one of three administrators, from triumvirōrum of three men, from trēs three + vir man

triˈumviral adj
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