n. 三执政官之一

[ noun ]
one of a group of three sharing public administration or civil authority especially in ancient Rome
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Triumvir \Tri*um"vir\, n.; pl. L. {Triumviri}, E. {Triumvirs}.
[L., fr. res, gen. trium, three + vir a man. See {Three}, and
{Virile}.] (Rom. Antiq.)
One of tree men united in public office or authority.

Note: In later times the triumvirs of Rome were three men who
jointly exercised sovereign power. Julius C[ae]sar,
Crassus, and Pompey were the first triumvirs;
Octavianus (Augustus), Antony, and Lepidus were the
second and last.