Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The male ruler of an empire.
  • n. The emperor butterfly.
  • n. The emperor moth.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The male monarch or ruler of an empire.
  • n. Specifically, the ruler of the Holy Roman Empire; the world-monarch.
  • n. A large, relatively valuable marble in children's games.

from the GNU version of the Collaborative International Dictionary of English

  • n. The sovereign or supreme monarch of an empire; -- a title of dignity superior to that of king

from The Century Dictionary and Cyclopedia

  • n. A commander-in-chief; a supreme leader of an army or of armies.
  • n. The sovereign or supreme ruler of an empire: a title of dignity conventionally superior to that of king: as, the emperor of Germany or of Russia. See empire.
  • n. In zoöl.: In entomology: One of several large sphinxes or moths: as, the peacock emperor, Saturnia pavonia. One of several large butterflies of the family Nymphalidæ: as, the purple emperor, the popular name in Great Britain of Apatura iris, also called the purple high-flier; the tawny emperor, A. herse. See Apatura.
  • n. In ornithology, one of sundry birds notable of their kind.
  • n. A large boa of Central America, Boa imperator, probably a variety of the Boa constrictor.
  • n. Synonyms Monarch, etc. See prince.
  • n. [capitalized] The trade-name of a standard quality of fine English drawing-paper made in sheets 72 by 48 inches.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the male ruler of an empire
  • n. red table grape of California
  • n. large moth of temperate forests of Eurasia having heavily scaled transparent wings
  • n. large richly colored butterfly

Etymologies

Middle English emperour, from Old French empereor, from Latin imperātor, from imperāre, to command : in-, in; see en-1 + parāre, to prepare; see perə-1 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old French empereor (Modern French empereur), from Latin imperator ("emperor; commander"), from imperare (" to command"). (Wiktionary)

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