Definition of racisms:
(n) :
Prejudice or discrimination based upon race or ethnicity; (countable) an action of such discrimination.
(n) :
The policies, practices, or systems (e.g. government or political) promoting this belief or promoting the dominance of one or more races over others.
(n) :
The belief that there are distinct human races with inherent differences which determine their abilities, and generally that some are superior and others inferior.