Lewis Short
dŭcātus (noun M) : dux
* Military leadership, command = ἡγεμονία (post-Aug.), Suet. Tib. 19; Flor. 3, 21, 2; Just. 2, 15, 14; Vulg. Sirach, 7, 4: calculis omnibus ducatum latrones ei deferunt,App. M. 7, p. 191 med.
* In gen., guidance (eccl. Lat.): caecus autem si caeco ducatum praestet,Vulg. Matt. 15, 14.
* Transf., authority: quaerere a domino ducatum,Vulg. Sir. 7, 4 al.
Charlton T. Lewis, Charles Short, A Latin Dictionary