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idea

noun [S] (PURPOSE)
 
 
/aɪˈdɪə/

Definition

C1 a purpose or reason for doing something: The idea of the game is to get rid of all your cards as soon as you can. The whole idea (= only purpose) of advertising is to make people buy things. The idea behind the national lottery is to raise money for good causes.Goals and purposesReasons and explanations
(Definition of idea noun (PURPOSE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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