[{"Bold_text": "adjective", "List Items": ["fourfold; consisting of four parts:a quadruple alliance.", "four times as great.", "Music.having four beats to a measure."]}, {"Bold_text": "noun", "List Items": ["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."]}, {"Bold_text": "verb (used with or without object)", "List Items": ["to make or become four times as great:To serve 24 people, quadruple the recipe. My savings quadrupled in 20 years."]}]