In-group (noun)

A group of people who share a common identity and interests, and who feel that they belong together and are distinct from others.

Origin:

Mid 20th century: from in- + group.

Examples:

1. The in-group members had a strong bond and sense of belonging.
2. The in-group excluded those who were different.
3. The in-group was exclusive and only accepted certain people.
4. The in-group provided a sense of community and support.
5. The in-group had its own set of rules and norms.