Definition of “accidental” - English Dictionary

“accidental” in English

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accidentaladjective

uk /ˌæk.sɪˈden.təl/ us /ˌæk.səˈden.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.

More examples

accidentalnoun [ C ]

uk /ˌæk.sɪˈden.təl/ us /ˌæk.səˈden.t̬əl/

accidental noun [ C ] (BIRD)

specialized biology a bird that is found in a place where birds of its type are not usually found :

You may spot accidentals driven in by the stormy weather.

(Definition of “accidental” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)