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1. A line going diagonally across the grain of fabric: Cut the cloth on the bias.
a. A preference or an inclination, especially one that inhibits impartial judgment.
b. An unfair act or policy stemming from prejudice.
3. A statistical sampling or testing error caused by systematically favoring some outcomes over others.
4. Sports
a. A weight or irregularity in a ball that causes it to swerve, as in lawn bowling.
b. The tendency of such a ball to swerve.
5. The fixed voltage applied to an electrode.
Slanting or diagonal; oblique: a bias fold.
tr.v. bi·ased, bi·as·ing, bi·as·es or bi·assed or bi·as·sing or bi·as·ses
1. To influence in a particular, typically unfair direction.
2. To apply a small voltage to (a grid).

[French biais, slant, from Provençal, perhaps ultimately from Greek epikarsios, slanted; see sker- in Indo-European roots.]
Synonyms: bias, jaundice, prejudice
These verbs mean to influence in a particular, often unfavorable way. To bias is to cause to incline toward or away from something or someone: claimed that the ruling was biased against low-income workers; was biased by experience in favor of stronger regulation.
To jaundice is to predispose toward negativity or skepticism: Years of scandal have jaundiced her view of politics.
To prejudice is to cause to judge prematurely, without full knowledge or due consideration; it often, but not always, suggests bigotry: were prejudiced by their narrow upbringing against those of a different race; moved the trial so as to find jurors who had not been prejudiced by news coverage of the case.


also bi·assed  (bī′əst)
Marked by or exhibiting bias; prejudiced: gave a biased account of the trial.
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also biassed
References in classic literature ?
Now your honour is to know, that these judges are persons appointed to decide all controversies of property, as well as for the trial of criminals, and picked out from the most dexterous lawyers, who are grown old or lazy; and having been biassed all their lives against truth and equity, lie under such a fatal necessity of favouring fraud, perjury, and oppression, that I have known some of them refuse a large bribe from the side where justice lay, rather than injure the faculty, by doing any thing unbecoming their nature or their office.
If the Portuguese were biassed by any particular views, another bias equally powerful may have deflected the Frenchman from the truth, for they evidently write with contrary designs: the Portuguese, to make their mission seem more necessary, endeavoured to place in the strongest light the differences between the Abyssinian and Roman Church; but the great Ludolfus, laying hold on the advantage, reduced these later writers to prove their conformity.
Flexibility of mind, a disposition easily biassed by others, is an attribute which you know I am not very desirous of obtaining; nor has Frederica any claim to the indulgence of her notions at the expense of her mother's inclinations.