Indoor (adjective)

1. Located, occurring, or done within a building.
2. Designed for use within a building.

Origin:

Early 17th century, from in- + door.

Examples:

1. She enjoys playing indoor sports during the winter.
2. The indoor pool was crowded with swimmers.
3. He only grows indoor plants because he has no outdoor space.
4. The indoor temperature was comfortable and regulated.
5. The indoor lighting was dim, creating a relaxing atmosphere.