Definition of quadruple

What does the word quadruple mean?

• part of speech: adjective

  Fourfold, consisting of four parts or involving four parties, (q. algebra, using four independent units; q. rhythm or time, with four beats to a measure; q. alliance &c.); amounting to four times the amount or number of, equivalent to fourfold the amount of, superior by four times in amount or number to, (has a light& heat q., or q. of or to, that of the earth); hence quadruply adv. (N.) number or amount four times greater than another (esp. the q. of). (Vb) multiply (t. & i.) by four. [French]