1. relating to or affecting the fundamental nature of something; far-reaching or thorough
2. favoring extreme or revolutionary changes in existing views, habits, conditions, or institutions
Usage: political

1. a person who advocates thorough or complete political or social reform
Usage: political
2. a group of atoms acting as a single unit in a number of compounds
Usage: chemistry
3. the root of a number or quantity
Usage: mathematics

Examples

• The company made radical changes to its business model.
• She proposed a radical solution to the housing crisis.
• His radical political views made him unpopular with conservatives.
• The radical protesters demanded immediate government reform.
• In chemistry, a hydroxyl radical contains one oxygen and one hydrogen atom.
• The square root symbol indicates a radical in mathematics.
• The radical transformation of the city took decades to complete.