revolution
n. countablen. a sudden, major change in how society works or who is in power. It can also mean a complete circle made by an object moving around a central point, like a planet orbiting a star.
n. a forcible overthrow of a government or social order in favour of a new system. In broader contexts, a dramatic and wide-reaching change in conditions, or the single completion of an orbit by a celestial body.
The invention of the internet caused a revolution in how we communicate.
The citizens started a revolution to overthrow the corrupt king and establish a democratic government.
While the industrial revolution brought unprecedented economic growth, it also introduced severe labour exploitation and environmental degradation that took decades of legislative reform to address.
Inherited from Middle English revolucion, borrowed from Old French revolucion, from Late Latin revolūtiōnem, accusative singular of revolūtiō (“the act of revolving; revolution”), from Latin revolvō (“roll back, revolve”).
Uncountable when referring to the general concept of political upheaval; countable when referring to a specific historical event or a single complete rotation.