em·per·or

[em-per-er]
noun
1.
the male sovereign or supreme ruler of an empire: the emperors of Rome.
2.
Chiefly British. a size of drawing or writing paper, 48 × 72 inches (122 × 183 cm).

Origin:
1175–1225; Middle English empero(u)r < Anglo-French; Old French empereor < Latin imperātor orig., one who gives orders, ruler, equivalent to imperā(re) to order, command (im- im-1 + -perāre, combining form of parāre to provide, prepare) + -tor -tor

em·per·or·ship, noun
pre·em·per·or, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To Emperor
00:10
Emperor is always a great word to know.
So is callithumpian. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Collins
World English Dictionary
emperor (ˈɛmpərə) [Click for IPA pronunciation guide]
 
n
1.  a monarch who rules or reigns over an empire
2.  See also giant peacock moth Also called: emperor moth any of several large saturniid moths with eyelike markings on each wing, esp Saturnia pavonia of Europe
3.  See purple emperor
 
[C13: from Old French empereor, from Latin imperātor commander-in-chief, from imperāre to command, from im- + parāre to make ready]
 
'emperorship
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

emperor
early 13c., from O.Fr. empereor (acc.), from L. imperiatorem (nom. imperiator) "commander, emperor," from stem of imperare "to command" (see empire). Originally a title conferred by vote of the Roman army on a successful general, later by the Senate on Julius and Augustus
Caesar and adopted by their successors except Tiberius and Claudius. In the Middle Ages, applied to rulers of China, Japan, etc.; only non-historical European application in Eng. was of the Holy Roman Emperors (who in Ger. documents are called kaiser), from late 13c., until in 1804 Napoleon took the title "Emperor of the French." Empress is attested from mid-12c.; Queen Victoria in 1876 became "Empress of India."
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The second consequence has been the fraying of an empire, and the sight of its
  emperor under siege.
In the primitive commonsense mind cosmic energy is constant and there are no
  clothes on the emperor.
The battery car emperor has no clothes till they significantly improve energy
  storage density and reduce cost, improve lifetimes.
Emperor penguins will eat ice to cool and hydrate, and they will even swallow
  rocks to help aid digestion.
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