Final answer:
Imperialism refers to when a larger/stronger nation gains political and economic control over a smaller/weaker nation. It involves the domination of one nation over another, through military conquest, economic exploitation, and the establishment of colonies or spheres of influence.
Step-by-step explanation:
Imperialism refers to when a larger/stronger nation gains political and economic control over a smaller/weaker nation. It involves the domination of one nation over another, with the dominating nation seeking to control the political, social, and economic aspects of the weaker nation. Imperialism often involves military conquest, economic exploitation, and the establishment of colonies or spheres of influence.