begin Definition in Cambridge American English Dictionary
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Definition of "begin" - American English Dictionary

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beginverb [I/T]

 us   /bɪˈɡɪn/ (present participle beginning, past tense began  /bɪˈɡæn/ , past participle begun  /bɪˈɡʌn/ )
to do or be the first part of something that continues; start: [T] He begins his new job on Monday. [I] The movie begins at seven. [I] I began by explaining why I had come.
(Definition of begin from the Cambridge Academic Content Dictionary © Cambridge University Press)
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