Dictionary
em•per•or
Pronunciation: (em'pur-ur), [key]—
n.
1. the male sovereign or supreme ruler of an empire:
the emperors of Rome.
2. Chiefly Brit.a size of drawing or writing paper, 48 × 72 in. (122 × 183 cm).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.