Definitions:
inclination or prejudice for or against one person or group, especially in a way considered to be unfair

a systematic distortion of a statistical result due to a factor not allowed for in its derivation.

a direction diagonal to the weave of a fabric

(in bowls) the irregular shape given to one side of a bowl.

a steady voltage, magnetic field, or other factor applied to a system or device to cause it to operate over a predetermined range.

cause to feel or show inclination or prejudice for or against someone or something

distort (a statistical result); introduce bias into (a method of sampling, measurement, analysis, etc.).

give a bias to