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English definition of “introduction”

introduction

noun [U] (PUT INTO USE)    /ˌɪn.trəˈdʌk.ʃən/
B2 an occasion when something is put into use or brought to a place for the first time: The introduction of new working practices has dramatically improved productivity. Within a year of its introduction, questions began to emerge about the safety of the drug.specialized The introduction of the tube into the artery is a very delicate procedure.Beginnings and starts
(Definition of introduction noun (PUT INTO USE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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