- A capital is the most important city of a country. The government of the country is usually located there.
- The (field) capital is the most important city in that particular field.
- Hollywood is the film capital, New York the theater capital, Las Vegas the gambling capital.
- A person's capital is all his money and wealth.
- A capital forms the topmost member of a column or pilaster. It broadens the area of the column's supporting surface.