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English definition of “tool”

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tool

noun [C]  /tul/ us  
a piece of equipment that you use to help you do a job, esp. something that you use with your hands to make or repair something: The only tools you need for this job are a hammer and a screwdriver. A tool is also anything that helps you to do something you want to do: We believe the new law will be an effective tool in fighting poverty.
(Definition of tool from the Cambridge Academic Content Dictionary © Cambridge University Press)
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