A Prejudice

1. (countable) An adverse judgment or opinion formed beforehand or without knowledge of the facts.
2. (countable) Any preconceived opinion or feeling, whether positive or negative.
3. (countable) An irrational hostile attitude, fear or hatred towards a particular group, race or religion.
4. (obsolete) Knowledge formed in advance; foresight, presaging.
5. (obsolete) Mischief; hurt; damage; injury; detriment.