The word corrector (from corrigere, ‘correct’) designates in general the critic who imposes censure or punishment, or the reorganizer, e.g. a pedagogue, overseer, official or politician with duties of this kind (Plin. Pan. 1,6,2; Sen. Dial. 4,10,7; Amm. Marc. 31,4,9).
From the time of Trajan the name corrector was given to a senatorial legate of the emperor who was sent to a province with a special mission, e.g. ad ordinandum statum liberarum civitatum (Plin. Ep. 8,24). Arising from this already in the 3rd cent. AD is a form of regular provincial admi…