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emperor definition

em·peror (em′pər ər)

noun

  1. the supreme ruler of an empire
  2. any of various butterflies (family Nymphalidae) and moths (family Saturniidae)

Etymology: ME emperour < OFr empereor, ruler (of the Holy Roman Empire) < L imperator, commander in chief < pp. of imperare, to command < in-, in + parare, to set in order, prepare

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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