Added 9 October 2026
arbitrary
/ˈɑː.bɪ.tɹə.ɹi/ adjective
In Latin: arbitrārius Wiktionary
adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about arbitrary at Wordnik → Where our words come from →
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Based on or subject to individual discretion or preference or sometimes impulse or caprice.
an arbitrary decision
Origin
From Middle English arbitrarie, Latin arbitrārius (“arbitrary, uncertain”), from arbiter (“witness, on-looker, listener, judge, overseer”).
From Wiktionary, via Kaikki.org (CC BY-SA)