What does colonialism mean?
Colonialism is the process of a group of external settlers, in this case settling in Africa and claiming the land for their own. In your case, this likely refers to the 1500-1900s when the British began expanding into other continents. An example is India. India was colonized by Britain, and never recovered fully. India was settled by the British, the people there were treated as inferior, and the British took over ruling the country, and only left after they had done irreversible damage.
