(Latin triumviratus, literally 'alliance of three men'). Non-titular appellation (e.g. in Suet. Aug. 27,1; Vell. Pat. 2,86,2) for the special power which Aemilius [I 12] Lepidus, Antonius [I 9] and Octavianus agreed to at Bononia for themselves and which was granted to them, initially for five years, in November 43 BC by plebiscite (lex Titia; see tresviri [3]).
Echoing this, modern scholarship also calls the informal 'group of three' of Caesar, Pompeius [I 3] and Licinius [I 11] Crassus (end of 60 BC) a triumvirate, though it lacked any legal basis (s…