Which definition best captures 'revolution'?

• A. a huge change in something, such as a political organization or country
• B. the circular movement around a certain celestial body
• C. a complete cycle
• D. a very important change in the way people act

Answer: (A)

Revolution is a dramatic, fundamental change that overturns or reorganizes a system, often involving a shift in power or structure. The best definition captures this broad, impactful sense by describing a huge change in something such as a political organization or country, which covers events like overthrowing regimes or sweeping reforms that rework how a society is governed.

In other contexts, revolution can mean the circular motion of one body around another (an orbit) or simply a complete cycle. Those senses exist in specialized fields, but they don’t convey the same sense of sweeping transformation that revolution typically implies in everyday use. A very important change in the way people act describes a social shift, which is related but narrower and doesn’t necessarily reflect the systemic restructuring that the term often conveys.