Intramural (adjective)

1. Within the walls of a building or organization.
2. Within the boundaries of an institution or organization.
3. Of or involving competition or activities within an institution or organization and not between different institutions or organizations.

Origin:

Late 19th century: from latin intramuralis, from intra- "within" + murus "wall".

Examples:

1. Intramural sports leagues.
2. Intramural debates between student groups.
3. Intramural politics within the company.
4. Intramural research projects.
5. Intramural activities for the students.