Final answer:
Imperialism refers to the establishment of dominant relationships between a political entity and another group. In U.S. history, U.S. imperialism was driven by the desire for political, military, and economic control over other nations.
Step-by-step explanation:
Imperialism is the establishment of dominant and exploitative relationships between a political entity, such as a nation, and another group or political entity, such as a colony. In the context of U.S. history, U.S. imperialism refers to the period in which the United States sought to expand its political, military, and economic control over other nations. This expansion was driven by various factors, including the belief in American exceptionalism and the desire for economic dominance. The acquisition of territories like the Philippines and U.S. involvement in Central America were key features of U.S. imperialism.