arbitrary

arbitrary is on the Academic Word List.

Pronunciation

• (UK) IPA ^(key): /ˈɑːbɪtrəri/
• (US) IPA ^(key): /ˈɑːrbɪtrɛri/

• Audio (US)

  (file)

Adjective

Positive arbitrary

Comparative more arbitrary

Superlative most arbitrary

1. If a rule, decision, or act is arbitrary, there is no logical reason for it.

   You are protected from arbitrary arrest by police.

Synonyms

• unreasonable
• whimsical

Antonyms

• reasonable

Related words and phrases

• arbitrate
• arbitration
• arbitrator
• baseless
• irrational
• unfounded