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English definition of “incidental”

incidental

adjective     /ˌɪn.sɪˈden.təl/ US  /-t̬əl/
less important than the thing something is connected with or part of: Try not to be distracted by incidental details. The points you make are true, but they're incidental to the main problem.Of little or less importance
(Definition of incidental adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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