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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
  • unbiased and impartial will not do the work that disinterested used to be reserved for.
  • Right now, my anger and resentment make it difficult for me to formulate clear, unbiased research questions.
  • We provide fundamental, unbiased content so people can ask informed questions.
  • Such issues as global warming and population have been wrested from rational and unbiased scientific discourse.
  • They say that consumers must rely on trained, professional journalists to ensure a report is unbiased and free of agendas.
  • And it is unbiased science that reveals the complexity and simplicity of these relationships.
  • Online comparisons, ratings and other unbiased information have made the tough task of selling tougher still.
  • And so much for open-minded, unbiased observation of evidence.
  • The key is to examine what you've done, in an unbiased way and critically, but not make yourself feel bad emotionally or crappy.
  • So let's not pretend that educational pedigree is a completely unbiased barometer of anyone's ability to perform a job.
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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