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English definition of “basis”

basis

noun [C]  /ˈbeɪ·sɪs/ (plural bases  /ˈbeɪ·siz/) us  
the most important facts or principles or ideas that support something: There is no basis for their statements. A basis is also a way or method of doing something: Mostly people work on a part-time basis.
(Definition of basis from the Cambridge Academic Content Dictionary © Cambridge University Press)
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