Nondenominational (adjective)

Not restricted to or associated with any particular religious denomination.

Origin:

Non- + denominational.

Examples:

1. The school is nondenominational and welcomes students of all faiths.
2. The church is nondenominational and open to everyone.
3. The event was a nondenominational service to remember the victims.
4. This is a nondenominational organization, it welcomes all people.
5. The group is a nondenominational discussion forum for different religions.