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English definition of “accidental”

accidental

adjective     /ˌæk.sɪˈden.təl/ US  /-t̬əl/
B2 happening by chance : Reports suggest that eleven soldiers were killed by accidental fire from their own side . The site was located after the accidental discovery of bones in a field .Accidents and disastersDifficult situations and unpleasant experiencesFailures
(Definition of accidental adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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