Prejudice
“A forejudgment; bias; partiality; preconceived opinion. A leaning towards one side of a cause for some reason other than a conviction of its justice.”
Source: Black’s Law Dictionary 6th Edition
“1 a : injury or damage due to some judgment or action of another (as in disregard of a person's right) : resulting detriment.
2 a (1) : preconceived judgment or opinion : leaning toward one side of a question from other considerations than those belonging to it : unreasonable predilection for or objection against something (2) : an opinion or leaning adverse to anything without just grounds or before sufficient knowledge b : an instance of such judgment or opinion : an unreasonable predilection, inclination, or objection c : an irrational attitude of hostility directed against an individual, a group, a race, or their supposed characteristics compare discrimination
3 obsolete a : an opinion or judgment formed beforehand or without due examination.”
Source: Webster’s Third New International Dictionary