Lewis Short
prō-praetor | prōprae-tōre, indecl. | prō praetōre (noun M) : (also or , )
* A magistrate in the times of the republic, who, after having administered the proetorship one year in Rome, was sent in the following yearas proetor to a province where there was no army, a proproetor (class.).—Form propraetor: cum bella a propraetoribus administrantur,Cic. Div. 2, 36, 76.—Form pro praetore, Sall. J. 103, 4: prorogatum Tubulo est, ut pro praetore in Etruriam succederet Calpurnio,Liv. 27, 22, 5.
* One who administers the proetorship of a province in the absence of the proetor: Aulo fratre in castris pro praetore relicto,Sall. J. 36, 4: quem pro praetore in castris relictum supra diximus,id. ib. 37, 3; Liv. 10, 25, 11; 29, 6, 9; Tac. A. 2, 66 al.; Caes. B. G. 1, 21.
Charlton T. Lewis, Charles Short, A Latin Dictionary