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English definition of “tool”

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tool

noun [C] uk   /tuːl/ us  

tool noun [C] (EQUIPMENT)

a piece of equipment that you use with your hands to make or repair something: power tools machine tools something that helps you to do a particular activity: A free low-interest credit card can be a useful budgeting tool.tool of the trade A tool of the trade is something you need to use to do your job: For the modern sales executive, a Blackberry is one of the tools of the trade.
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tool noun [C] (PERSON)

disapproving someone whose decisions and actions are unfairly controlled by others: The president was widely regarded as the tool of the military.

tool noun [C] (PENIS)

offensive a penis
(Definition of tool from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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