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[C usually singular U] often supporting or opposing a particular person or thing in an unfair way by allowing personal opinions to influence your judgmentThe government has accused the media of bias.
Reporters must be impartial and not show political bias.
There was clear evidence of a strong bias against her.
There has always been a slight bias in favour of/towards employing arts graduates in the company.
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[C usually singular] a preference towards a particular subject or thingShe showed a scientific bias at an early age.