All 3 Uses

bias
in
Perfect Chemistry
(Auto-generated)

What he knows about me is in my school file, a file so biased it's probably ten inches thick.†

biased = created a personal preference; or creates a tendency to move in a particular direction
Just so you know, my goal is for every student in this school to succeed. Every student, Alex. Including you, so whatever biases you have about me you can throw them out the window.
*

biases = prejudices against; or tendencies to mistrust
I guess I'm a bitch to even ask him for advice when he can't possibly be unbiased.†

unbiased = without a personal preference; or without any tendency to move in a particular direction

standard prefix: The prefix "un-" in unbiased means not and reverses the meaning of biased. This is the same pattern you see in words like unhappy, unknown, and unlucky.

Definitions:

(1) (bias)
a tendency to favor one side -- in people, a prejudice that affects fair judgment; more generally, any built-in lean to move or behave in a particular way (like a car that pulls right)
(2) (meaning too rare to warrant focus)
Specialized meanings of bias include:
- statistics: any of several errors that distort results
- textiles: a line or fold that is diagonal relative to the sides or grain of the fabric
- electronics: a steady-state current that is forced through an electronic device