quadruple

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English

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quadruple verb

To multiply by four.“Quadrupling four gives sixteen.”
To increase by a factor of four.“Our profits quadrupled when we made the improvements.”
To provide four parallel running lines on a given stretch of railway.

quadruple adjective

Being four times as long, as big or as many of something.“He's quite an athlete and can do quadruple jumps with ease.”

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