What is imperialism simple definition?

Imperialism refers to the policy or practice of extending the rule or authority of an empire or nation over foreign countries, territories, or peoples for economic, political, or strategic gain. It involves the use of military force or economic coercion to establish and maintain political and economic control over other nations or peoples. Imperialism is often motivated by a desire for resources such as raw materials, labor, or markets, and can have long-lasting and negative impacts on the colonized or dominated peoples. Imperialism has been a significant force in world history, particularly during the late 19th and early 20th centuries, and its effects continue to be felt today.