: tending to yield one outcome more frequently than others in a statistical experiment
a biased coin
3
: having an expected value different from the quantity or parameter estimated
a biased estimate
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Bias vs. Biased
In recent years, we have seen more evidence of the adjectival bias in constructions like “a bias news program” instead of the more usual “a biased news program.” The reason is likely because of aural confusion: the -ed of biased may be filtered out by hearers, which means that bias and biased can sound similar in the context of normal speech. They are not interchangeable, however. The adjective that means “exhibited or characterized by an unreasoned judgment” is biased (“a biased news story”). There is an adjective bias, but it means “diagonal” and is used only of fabrics (“a bias cut across the fabric”).
It's also politically biased, full of slighting references to the Whigs, whom Johnson detested, and imperiously chauvinistic, wherever possible dismissing or making light of words imported from French.—Charles McGrath, New York Times Book Review, 4 Dec. 2005I am willing to believe that history is for the most part inaccurate and biased, but what is peculiar to our age is the abandonment of the idea that history could be truthfully written. In the past people deliberately lied, or they unconsciously colored what they wrote, or they struggled after the truth, well knowing that they must make many mistakes; but in each case they believed that 'the facts' existed and were more or less discoverable.—Leon Wieseltier, New Republic, 17 Feb. 2003The information experts say that it's dangerous to conclude very much from talking to people because you will never interact with a scientifically selected random sample. Thus, the information you derive from meeting people is biased or anecdotal.—Will Manley, Booklist, 1 Mar. 2002But even if you think I may be biased about the book's conclusions, please trust me about its awful prose.—James Martin, Commonweal, 3 May 2002
She is too biased to write about the case objectively.
He is biased against women.
The judges of the talent show were biased toward musical acts.
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There can be data bias, which is when AI systems are trained on biased data that can contain an overrepresentation of some groups (white people for example) and an underrepresented of other groups (non-white people for example).—Janice Gassam Asare, Forbes.com, 23 June 2025 And Read’s many supporters – both outside the Dedham, Massachusetts, courthouse and online – championed her case, echoing her allegations of police corruption as her defense inside the courtroom painted the investigation as flawed and biased.—Dakin Andone, CNN Money, 23 June 2025 The trial has centered in part on lead investigator Michael Proctor, who defense attorneys described as biased against Read from the beginning.—Patrick Whittle, Twin Cities, 20 June 2025 The second time around, Read's lawyers argued that the police investigation was so flawed and biased that prosecutors couldn't even prove Read had hit O'Keefe with her car.—Rachel Treisman, NPR, 18 June 2025 See All Example Sentences for biased
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