IPA: /ɪmˈpɪəriəlɪzəm/
KK: /ɪmˈpɪrɪəlɪzəm/
The practice of a country extending its power and influence over other countries, often through colonization or control of their political and economic systems.
The era of imperialism led to significant changes in many countries around the world.
Imperialism is formed from "imperium" (from Latin, meaning command or authority) and "-ism" (a suffix used to denote a practice or ideology). The word refers to the practice or ideology of extending a nation's authority or control over other countries or territories.
Think of 'imperium' meaning command, which helps you remember that 'imperialism' is about the practice of extending control or authority over other lands.