1. specific opinion directed towards a fixed judgement
clear/strong/heavy bias for/against, unbiased approach/opinion
A 'bias' is a prejudice towards an individual or a group of people which is considered to be unjust. A bias can be conscious or unconscious (i.e. you do or do not know). This is an expression used often in scientific studies or psychological studies where bias is undesirable. Similar in meaning to 'partiality' and 'prejudice'.