Which definition best captures 'arbitrary' in common usage?

• A. Based on personal whim rather than logic
• B. Determined in a random way
• C. Decided by a fixed rule
• D. Unpredictable or capricious

Answer: (B)

Arbitrary means choosing or deciding without a guiding rule or justification, often feeling like a whim or a matter of chance. In everyday use, it’s the idea that there isn’t a fixed method or reason behind the choice. The best match is “determined in a random way” because it directly conveys the absence of a set pattern or logic in the decision. While phrases like “based on personal whim rather than logic” or “unpredictable or capricious” describe similar notions, they’re somewhat broader; the sense of randomness or lack of a rule is the most typical way people understand arbitrary. The idea of something being “decided by a fixed rule” clearly doesn’t fit, since a fixed rule implies order and consistency, not arbitrariness.