Real Dictionary

bias
variable noun: Bias is a concern with or interest in one thing more than others.
variable noun: Bias is a tendency to prefer one person or thing to another, and to favour that person or thing.

bias in American English
a line, cut or sewn diagonally across the weave of cloth, as in making seams, binding tape, etc.
diagonally
slanting; diagonal
to cause to have a bias; influence; prejudice
noun: an oblique or diagonal line of direction, esp. across a woven fabric

bias in British English
adjective: slanting obliquely; diagonal
adverb: obliquely; diagonally
noun: mental tendency or inclination, esp an irrational preference or prejudice
verb: to cause to have a bias; prejudice; influence