How could you define bias?

There is actually 3 ways to define the word Bias, so here's the definitions

1. prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.

2. in some sports, such as lawn bowling, the irregular shape given to a ball. verb

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

prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.