- fourfold; consisting of four parts: a quadruple alliance.
- four times as great.
- having four beats to a measure.
- a number, amount, etc., four times as great as another.
- something, as a series of acrobatic somersaults, made up of four clearly defined parts or stages: the first trapeze artist to perform a quadruple successfully.
- to make or become four times as great: To serve 24 people, quadruple the recipe. My savings quadrupled in 20 years.
- to multiply by four or increase fourfold
- four times as much or as many; fourfold
- consisting of four parts
- a quantity or number four times as great as another
