As a noun tribune
is platform, rostrum.
As an adjective triune is
threefold, having three components that are both separate and united;.
an elected official in ancient Rome
a protector of the people
the domed or vaulted apse in a Christian church that houses the bishop’s throne
a place or an opportunity to speak, to express one's opinion, a platform
- this new magazine's goal is to give a tribune to unmarried mothers
Threefold, having three components that are both separate and united;
* triune brain