Bias refers to a tendency to prefer one person or thing to another, and to favor that person or thing.
In psychology, bias is a disproportionate weight in favor of or against an idea or thing, usually in a way that is closed-minded, prejudicial, or unfair.
The term "bias" also refers to:
1. A systematic distortion of statistical results
2. The diagonal line of fabric in sewing
3. In electronics, a DC voltage applied to a transistor or vacuum tube