noun rac·ism \ˈrā-ˌsi-zəm also -ˌshi-\
Simple Definition of racism
: poor treatment of or violence against people because of their race
: the belief that some races of people are better than others
Source: Merriam-Webster's Learner's Dictionary
Full Definition of racism
1: a belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race
2: racial prejudice or discrimination
racist \-sist also -shist\ noun or adjective
1) Strict definition: An irrational bias towards members of a racial background. The bias can be positive (e.g. one race can prefer the company of its own race or even another) or it can be negative (e.g. one race can hate another). To qualify as racism, the bias must be irrational. That is, it cannot have a factual basis for preference.
2) Commonly intended definition(in America): A bias that white people have against blacks
3) Politically motivated definition: A justifiable reason to redistribute resources or opportunities between groups on the basis of race alone.
1) One is not a racist for pointing out that blacks receive lower scores on their ACTs, SATs, GREs, LSATs and other standardized tests of academic achievement.
2) One is a racist for pointing out #1 *IF* there is no reason for pointing it out other than to make black people feel inferior.
3) Racism is the reason that a 20 on the ACT should actually be considered a 25 if the test taker was black.
Source: Urban Dictionary