emperor
Americannoun
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the male sovereign or supreme ruler of an empire.
the emperors of Rome.
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Chiefly British. a size of drawing or writing paper, 48 × 72 inches (122 × 183 centimeters).
noun
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a monarch who rules or reigns over an empire
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Also called: emperor moth. any of several large saturniid moths with eyelike markings on each wing, esp Saturnia pavonia of Europe See also giant peacock moth
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See purple emperor
Other Word Forms
Etymology
Origin of emperor
First recorded in 1175–1225; Middle English empero(u)r, (from Anglo-French; Old French empereor, from Latin imperātor, originally, “one who gives orders, ruler,” equivalent to imperā(re) “to order, command” ( im- “in” + -perāre, combining form of parāre “to provide, get ready” ) + -tor noun suffix of agency; see im- 1, prepare, -tor
Compare meaning
How does emperor compare to similar and commonly confused words? Explore the most common comparisons:
Explanation
Forget prime ministers, presidents or even kings or queens: an emperor was the biggest, baddest ruler of them all — the leader of undisputed power who controlled a nation or, more usually, a number of subjugated nations known collectively as an empire. Nowadays the emperor is no more, replaced by humbler and usually more democratic leaders, but the notion of an all-conquering larger-than-life figure lives on in the way we give the prefix emperor to particularly magnificent specimens of living things: the Emperor Butterfly, Emperor Moth and Emperor Penguin, most famously. The Roman emperors would be proud.
Vocabulary lists containing emperor
Ancient Rome - Introductory
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Aztec, Maya, and Inca Empires - Introductory
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"The Lotus Seed"
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In his prime, Salieri was a solid songsmith, popular enough to secure a gig as court composer to Emperor Joseph II in Vienna.
From Salon • May 16, 2026
When an ancient bronze statue of Roman Emperor Marcus Aurelius landed back on Turkish soil after decades abroad, it was more than a symbolic homecoming.
From Barron's • Mar. 20, 2026
It is "probably the most dangerous time for adult Emperor penguins because they haven't got their waterproof suits on," he says.
From BBC • Feb. 25, 2026
The Greeks were in charge of Egypt for three centuries, before the Romans muscled their way in under Emperor Augustus.
From The Wall Street Journal • Feb. 20, 2026
But the friars had fallen out of favor with Emperor Joseph II in 1783.
From "The Gene" by Siddhartha Mukherjee
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
