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[uhn-bahy-uh st] /ʌnˈbaɪ əst/
not biased or prejudiced; fair; impartial.
Also, especially British, unbiassed.
Origin of unbiased
1600-10; un-1 + biased
Related forms
unbiasedly, adverb
fair, equitable, tolerant, neutral. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for unbiased
Contemporary Examples
Historical Examples
  • Altogether he was charmed, whether considering her as with the eyes of an unbiased stranger or with his own.

    Helen Maria Edgeworth
  • See the set lips of the 'unbiased twelve' as they retire for consideration of their verdict!

    Oswald Langdon Carson Jay Lee
  • What man, sincere and unbiased in his opinions, could repeat to-day the famous credo quia absurdum?

  • What was more, I wanted an honest man who would form an unbiased opinion.

    The Long Portage Harold Bindloss
  • It was the unbiased opinion of several wool-dealers present, that the shearing above would yield at least 35 lbs.

    Domestic Animals Richard L. Allen
British Dictionary definitions for unbiased


having no bias or prejudice; fair or impartial
  1. (of a sample) not affected by any extraneous factors, conflated variables, or selectivity which influence its distribution; random
  2. (of an estimator) having an expected value equal to the parameter being estimated; having zero bias
  3. Also called discriminatory. (of a significance test). Having a power greater than the predetermined significance level
Derived Forms
unbiasedly, unbiassedly, adverb
unbiasedness, unbiassedness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for unbiased

c.1600, literal, in reference to throws at bowls, from un- (1) "not" + biased. Figurative sense of "impartial, unprejudiced" is recorded from 1640s.

Online Etymology Dictionary, © 2010 Douglas Harper
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