Lewis & Short

măgistĕro, and, sync., măgistro, āvi, ātum, 1, v. a. [magister], to perform the office of a director or chief, to rule, direct, command: magisterare regere et temperare est, Paul. ex Fest. p. 152 Müll.; cf.: magisterare moderari, id. p. 126: inter manipulares vitam militarem magistrans, Spart. Hadr. 10.