I. co‧lo‧ni‧al¹ /kəˈləʊniəl $ -ˈloʊ-/ adjective

1. relating to a country that controls and rules other countries, usually ones that are far away ⇒ colony:
the struggle against colonial rule
Britain was the largest colonial power.

2. made in a style that was common in the US in the 18th century:
a large colonial house

3. relating to the US when it was under British rule:
The town was first established in colonial times.

[TahlilGaran] Dictionary of Contemporary English ▲

II. colonial² noun [countable]
someone who lives in a colony but who is a citizen of the country that rules the colony

[TahlilGaran] Dictionary of Contemporary English ▲