/ Dictionary / Index E emperor: Meaning and Definition of Find definitions for: em•per•or Pronunciation: (em'pur-ur), [key] — n. the male sovereign or supreme ruler of an empire: the emperors of Rome. 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. See also: emperor (Thesaurus) empennage emperor butterfly Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language