A revolution from above refers to major political and social changes that are imposed by an élite on the population it dominates.
By contrast, the plain term "revolution" suggests that pressure from below is a major driving force in events, even if other social groups cooperate with—or ultimately capture—the movement.
The phrase "revolution from above" was coined by the Spanish writer Joaquín Costa (1846-1911) in the 19th century.
[1] In contrast, a "revolution from below" refers to a grassroots campaign against élites.
Johann Gottlieb Fichte advocated the right of revolution, particularly from above rather than below.