pl. -·virs or -·viri·
- in ancient Rome, any of a group of three administrators sharing authority equally
- any of three persons associated in office or authority
Origin of triumvirL, back-formation ; from trium virum, genitive plural of tres viri, three men ; from tres, three + vir, a man (for Indo-European base see werewolf)
nounpl. tri·um·virs or tri·um·vi·ri
- One of three men sharing public administration or civil authority in ancient Rome.
- One of three people sharing public administration or civil authority.
Origin of triumvirMiddle English, from Latin, back-formation from triumvir&imacron;, board of three, from trium virum, of three men : trium, genitive pl. of tr&emacron;s, three; see trei- in Indo-European roots + virum, archaic genitive pl. of vir, man; see w&imacron;-ro- in Indo-European roots.
(plural triumviri or triumvirs)
- One member of a triumvirate
Middle English back-formation from triumvirate.