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opening

noun (BEGINNING)
 
 
/ˈəʊ.pən.ɪŋ/ US  /ˈoʊp.nɪŋ/

Definition

B2 [C usually singular] the beginning of something: The opening of the novel is amazing.Beginnings and starts [C] the beginning of a game of chess: If you want to get anywhere in chess, you have to study the various openings.Chess
(Definition of opening noun (BEGINNING) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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