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English definition of “arbitrary”

arbitrary

adjective    /ˈɑr·bɪˌtrer·i/
based on a desire or idea or chance rather than reason: Her outfit was an arbitrary choice but was just perfect. arbitrarily    /ˌɑr·bəˈtreər·ə·li/ adverb We didn’t think much about it, just arbitrarily decided to go to Italy. arbitrariness  /ˌɑr·bəˈtreər·i·nəs/ noun [U] disapproving The arbitrariness of human nature infuriates me.
(Definition of arbitrary adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
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