Arbitrary: ' Arbitrary ' means based on

' Arbitrary ' means based on random choice or personal whim, rather than any reason or system. It can also describe someone who exercises unrestrained and autocratic authority. Learn the meaning of arbitrary , an adjective that describes something based on chance or personal power rather than reason or rules. Find out how to use it in sentences and explore related words and phrases. ARBITRARY meaning: 1. based on chance rather than being planned or based on reason: 2. using unlimited personal power…. Learn more. Arbitrary definition: subject to individual will or judgment without restriction ; contingent solely upon one's discretion.. See examples of ARBITRARY used in a sentence.