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unbiased

[uhn-bahy-uh st]
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adjective
  1. not biased or prejudiced; fair; impartial.
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Also especially British, un·bi·assed.

Origin of unbiased

First recorded in 1600–10; un-1 + biased
Related formsun·bi·ased·ly, adverb

Synonyms

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fair, equitable, tolerant, neutral.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for unbiased

unbiased

unbiassed

adjective
  1. having no bias or prejudice; fair or impartial
  2. statistics
    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
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Derived Formsunbiasedly or unbiassedly, adverbunbiasedness or 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

Word Origin and History for unbiased

adj.

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

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Online Etymology Dictionary, © 2010 Douglas Harper