Em'per-or, n.

n. [O. Fr. empereor, empereour, N. Fr. empereur, Pr. emperaire, emperador, Sp. & Pg. emperador, It. imperatore, Lat. imperator, from imperare, to command, from im, for in, in, and parare, to prepare, to order.] The sovereign or supreme monarch of an empire; a title of dignity superior to that of king; as, the emperor of Germany or of Russia.

Emperor paper, the largest size of drawing paper.