Ōp'er-ā'tor, n.
n. [Lat., It. operatore, Sp. operador, Fr. opérateur.]
Sense 1. One who, or that which, operates; one who, or that which, produces an effect.
Sense 2. (Surg.) The person who performs some act upon the human body by means of the hand, or with instruments; as, a skillful operator.