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English definition of “assimilation”

assimilation

noun [U]  /əˌsɪm·əˈleɪ·ʃən/ us  
the process of becoming similar to others by taking in and using their customs and culture: The assimilation of immigrants into American culture has been a constant feature of US history.
(Definition of assimilation from the Cambridge Academic Content Dictionary © Cambridge University Press)
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