COLONIALISM

Co‐lo″ni‐al‐ism (?), n. 1. 1. The state or quality of, or the relationship involved in, being colonial.
The last tie of colonialism which bound us to the mother country is broken. Brander Matthews. 2. 2. A custom, idea, feature of government, or the like, characteristic of a colony.
3. 3. The colonial system or policy in political government or extension of territory.