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English definition of “rationale”

rationale

noun [C, usually singular]     /ˌræʃəˈnɑːl/ US   /ˌræʃəˈnæl/
the set of reasons that are given to explain a particular decision, action, etc.: We have spoken to shareholders to explain the rationale behind our bid.the rationale for sth/doing sth This data can be abused by insurance companies seeking any rationale for charging higher rates.
(Definition of rationale noun from the Cambridge Business English Dictionary © Cambridge University Press)
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