Expansionism refers to the policy or ideology of a country or empire expanding its territory, influence, or power through various means such as colonization, military conquest, or economic dominance.
Related terms
Imperialism: Imperialism is a form of expansionism where one country extends its control over other nations through political and economic domination.
Manifest Destiny: Manifest Destiny was an expansionist belief held by Americans in the 19th century that it was their destiny to expand across the continent from coast to coast.
Colonialism: Colonialism involves the establishment and maintenance of colonies by one country in another territory for economic exploitation and political control.