In-Group - The term in-group is another way of saying the majority. The in-group is the group of people who feel they are different and better than those people who they are prejudiced against. Members of the in-group believe in certain stereotypes, which cause them to maintain certain social -isms. They are also responsible for discriminating against people who are different from them in some respect.
Out-Group - The term out-group means those people in the minority. The out-group is seen as different, abnormal, and often times less human than those of the in-group. Members of the out-group are the stereotyped by the in-group, and are the major victims of social -isms and discrimination.