arbitrary Meaning, definition in Cambridge English Dictionary
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Meaning of "arbitrary" - English Dictionary

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arbitraryadjective

uk   /ˈɑː.bɪ.trər.i/  us   /ˈɑːr.bə.trer-/

arbitrary adjective (CHANCE)

C2 based on chance rather than being planned or based on reason: arbitrary decision-making Did you have a reason for choosing your destination or was it arbitrary?
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arbitrary adjective (UNFAIR)

disapproving using unlimited personal power without considering other people's wishes: an arbitrary ruler The company has been the subject of an arbitrary take-over.
arbitrarily
adverb uk   /ˌɑː.bɪˈtreə.rɪ.li/  us   /ˌɑːr.bɪˈtrer.ɪ-/
We made the decision to go to Italy quite arbitrarily.
arbitrariness
noun [U] uk   us   /-nəs/
(Definition of arbitrary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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