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[im-peer-ee-uh-liz-uh m] /ɪmˈpɪər i əˌlɪz əm/
the policy of extending the rule or authority of an empire or nation over foreign countries, or of acquiring and holding colonies and dependencies.
advocacy of imperial or sovereign interests over the interests of the dependent states.
imperial government; rule by an emperor or empress.
an imperial system of government.
British. the policy of so uniting the separate parts of an empire with separate governments as to secure for certain purposes a single state.
Origin of imperialism
First recorded in 1855-60; imperial1 + -ism
Related forms
imperialist, noun, adjective
imperialistic, adjective
imperialistically, adverb
nonimperialistic, adjective
nonimperialistically, adverb
unimperialistic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for imperialism
Contemporary Examples
Historical Examples
  • The Sahara desert is just as good a field for imperialism, and a lot closer to home.

    Valley of Dreams Stanley Grauman Weinbaum
  • In short, the commercial excuse for imperialism is actually obsolete.

    The World in Chains John Mavrogordato
  • "Trade supplies no explanation of imperialism," says Mr. Brailsford (p. 75).

    The World in Chains John Mavrogordato
  • What came then was not imperialism; it was Anti-imperialism.

    A Short History of England

    G. K. Chesterton
  • We have no satire yet on militarism, or imperialism, or the Monroe doctrine.


    William Graham Sumner
British Dictionary definitions for imperialism


the policy or practice of extending a state's rule over other territories
an instance or policy of aggressive behaviour by one state against another
the extension or attempted extension of authority, influence, power, etc, by any person, country, institution, etc: cultural imperialism
a system of imperial government or rule by an emperor
the spirit, character, authority, etc, of an empire
advocacy of or support for any form of imperialism
Derived Forms
imperialist, adjective, noun
imperialistic, adjective
imperialistically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for imperialism

1826, "advocacy of empire," originally in a Napoleonic context, also of Rome and of British foreign policy, from imperial + -ism. At times in British usage (and briefly in U.S.) with a neutral or positive sense relating to national interests or the spread of the benefits of Western civilization, but from the begining usually more or less a term of reproach. General sense of "one country's rule over another," first recorded 1878. Picked up disparagingly in Communist jargon by 1918.

It is the old story of 1798, when French republicanism sick of its own folly and misdeeds, became metamorphosed into imperialism, and consoled itself for its incapacity to found domestic freedom by putting an iron yoke upon Europe, and covering it with blood and battle-fields. [Francis Lloyd, "St. James's Magazine," January 1842]

Online Etymology Dictionary, © 2010 Douglas Harper
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imperialism in Culture

imperialism definition

Acquisition by a government of other governments or territories, or of economic or cultural power over other nations or territories, often by force. Colonialism is a form of imperialism.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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