New Imperialism

Colonialism

the acquisition and exploitation of territory by a foreign power for its own economic and political benefit

Imperialism

A policy of exerting cultural, economic, or political influence over the affairs of weaker states

Setter Colony

Foreign settlers immigrate and permanently reside on land already inhabited by indigenous groups of people. 

Decolonization 

Undoing colonialism in a country. A foreign nations withdraws, leaving the indigenous population to their own independence