WHAT IS MEANING OF  COLONIALISM  AND SLAVERY ? Colonialism is the control or governing influence of a nation over a dependent country, territory, or people.The system or policy by which a nation maintains or advocates such control or influence,the state or condition of being colonial.Slavery refers to a condition in which individuals are owned by others, who control where they live and at what they work. Slavery had previously existed throughout history, in many times and most places.