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English definition of “function”

function

noun [C] (PURPOSE)    /ˈfʌŋk.ʃən/
B2 the natural purpose (of something) or the duty (of a person): The function of the veins is to carry blood to the heart. I'm not quite sure what my function is within the company. A thermostat performs the function of controlling temperature.Goals and purposes
(Definition of function noun (PURPOSE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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