in group, in-group n. An exclusive circle of people with a common purpose, interests, or attitudes, especially one that produces feelings of camaraderie, exclusivity, community, and solidarity.
... in language and writing is turning from studies of origins to investigations of their function in group life. Material is now available which indicates the extent to which the group may be studied through its language. Accordingly the point of view for the study of orthodox speech, or "correct" English, is that ... — Introduction to the Science of Sociology • Robert E. Park
... the present study is to analyze the various positions found within the pacifist movement itself in regard to the use of non-violent techniques of bringing about social change in group relationships. In its attempt to differentiate between them, it makes no pretense of determining which of the several pacifist positions is ethically most valid. Hence it is concerned with the application of non-violent principles in practice and their effectiveness ... — Introduction to Non-Violence • Theodore Paullin