pulley

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noun pul·ley \ˈpu̇-lē\

Definition of pulley

plural

pulleys

  1. 1 :  a sheave or small wheel with a grooved rim and with or without the block in which it runs used singly with a rope or chain to change the direction and point of application of a pulling force and in various combinations to increase the applied force especially for lifting weights

  2. 2 :  a pulley or pulleys with ropes to form a tackle that constitutes one of the simple machines

  3. 3 :  a wheel used to transmit power by means of a band, belt, cord, rope, or chain passing over its rim

Illustration of pulley

Origin and Etymology of pulley

Middle English poley, pully, from Anglo-French pulie, probably ultimately from Greek polos axis, pole — more at pole


First Known Use: 14th century


PULLEY Defined for English Language Learners

pulley

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noun pul·ley \ˈpu̇-lē\

Definition of pulley for English Language Learners

  • : a wheel or set of wheels that is used with a rope, chain, etc., to lift or lower heavy objects


PULLEY Defined for Kids

pulley

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noun pul·ley \ˈpu̇-lē\

Definition of pulley for Students

plural

pulleys

  1. :  a wheel over which a belt, rope, or chain is pulled to lift or lower a heavy object


Medical Dictionary

pulley

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noun pul·ley \ˈpu̇l-ē\

Medical Definition of pulley



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