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imperialism

/im-PEER-ee-uh-liz-uhm/ noun

1A policy of a country extending its power and control over other lands and peoples

Imperialism Definition: Power Beyond a Nation’s Borders

Law and societyNounHistoryUpdated 26 Oct 2026

A plain imperialism definition is this: imperialism is a policy or practice in which a country extends its power and control over other territories and peoples, whether by conquest, settlement, economic pressure or cultural influence. The result is an empire, or something that works like one.

People look up the imperialism meaning because the word shows up in history lessons, in debates about the past, and in arguments about today's world. It is a descriptive term for historians, but in everyday politics it is also used as an accusation, so it helps to know both the core meaning and why people disagree about how to apply it.

Entry at a glance

  • Meaning

    Extending a nation's rule or influence over other lands and peoples
  • Part of speech

    Noun
  • Pronunciation

    im-PEER-ee-uh-liz-uhm
  • Word forms

    imperialist (noun, adjective), imperialistic (adjective), imperial (adjective)
  • Origin

    From imperial + -ism; Latin imperium, "command, empire"; first recorded in English in 1826
  • Related ideas

    colonialism, empire, hegemony, sovereignty
  • Register

    Neutral in history writing; often critical in political speech

Imperialism definition in three parts

Most scholars who define imperialism agree on three parts:

  1. A stronger power, usually a state, that wants to extend its reach.
  2. Control over others, which can be direct (governing a territory) or indirect (shaping its economy or politics from outside).
  3. Unequal relations, where decisions about the controlled area are made largely in the interest of the dominant power.

Historians use the word for ancient empires such as Rome and for the European, Japanese and other empires of the modern era. Political scientists also use it for situations where no flag is raised over a territory, but outside economic or military power shapes what local people can decide.

Forms imperialism can take

FormHow control works
Formal or directThe territory is annexed or ruled as a colony by officials from the dominant power.
InformalLocal rulers stay in place, but key decisions follow the outside power's wishes.
EconomicControl through trade terms, debt, investment or ownership of resources.
CulturalThe spread of one society's language, media and values, sometimes at the expense of local ones.

Whether the last two count as true imperialism is debated. Some scholars keep the word for direct political control; others think the label fits any lasting, unequal influence.

A short history of the idea

Empires are ancient, but the word is fairly new. English first recorded imperialism in 1826, when it meant support for an empire or for imperial interests. Around the late 1870s writers applied it in the wider sense of one country ruling another. Even early on it was often a term of criticism, though some people used it proudly.

The period from about the 1870s to the First World War is often called the age of "new imperialism", when European powers rapidly divided much of Africa and expanded across Asia and the Pacific. The British Crown took direct rule of India in 1858, which lasted until independence in 1947. After the Second World War, a wave of decolonisation created dozens of new independent states.

Imperialism and colonialism: the difference

The two overlap, and many people use them almost interchangeably, but there is a useful distinction:

  • Colonialism usually means settling or directly governing a territory, often with settlers or administrators moving there.
  • Imperialism is the broader idea of extending power, which may or may not involve colonies.

A simple way to remember it: every colonial project is imperial, but not all imperialism needs colonies. Related concepts include hegemony, which means dominant influence, and nationalism, which both fuelled empires and later drove independence movements.

Why people disagree about it

Debate around imperialism tends to centre on a few questions:

  • Its effects: some writers point to railways, schools or legal systems built under imperial rule; others stress lost lives, famine, forced labour, drained wealth and denied self rule. Many historians argue the balance must be judged region by region.
  • Its scope today: people disagree on whether modern military bases, trade deals under global capitalism, aid or global companies amount to imperialism, or whether that stretches the term too far.
  • Its use as a label: in political speech, calling a rival "imperialist" is a strong charge, and different sides apply it to different countries.

A careful reader asks who is using the word, for which situation, and what kind of control they mean. Words such as colony, empire and treaty belong with our law, politics and society collection.

Imperialism in example sentences

  • Our history unit compares Roman imperialism with the European empires of the nineteenth century.
  • The museum exhibit shows how imperialism changed farming and trade routes across the region.
  • Some economists argue that heavy foreign debt can work like a quiet form of economic imperialism.
  • She wrote her thesis on resistance to imperialism in coastal West Africa.
  • Critics described the film industry's global reach as cultural imperialism, while supporters called it simple popularity.
In class, a student reads that a foreign company controlled a country's ports, mines and railways while a local king stayed on the throne. The teacher asks whether this counts as imperialism. The answer many historians give is yes, informal imperialism: power without formal annexation.

Frequently asked questions

What is the definition of imperialism in simple words?

It is when a powerful country takes control of, or strongly influences, other places and people beyond its borders. The control can be political, economic, military or cultural.

What is the difference between imperialism and colonialism?

Colonialism usually involves directly governing or settling a territory. Imperialism is broader and covers any extension of power over other peoples, including indirect economic or political control.

When did the age of new imperialism happen?

Historians usually place it from roughly the 1870s to the First World War, when European powers and some others expanded rapidly across Africa, Asia and the Pacific.

Is imperialism a negative word?

In history writing it is a descriptive term. In everyday political talk it is usually critical, and calling a country imperialist is a strong accusation.

What does cultural imperialism mean?

It describes one society's culture, language or media spreading so widely that it pushes aside local cultures. People debate whether this is real domination or simply free choice by audiences.

How do you pronounce imperialism?

Say im-PEER-ee-uh-liz-uhm, with the main stress on the second syllable.