Terminus is the god of boundaries, specifically the boundaries of farmland, and of boundary stones. Each boundry stone had its own Termini (spirit). Terminus' boundry stone was kept in the temple of Jupiter Optimus Maximus. Boundry stones sacred to Terminus were oiled, covered with plants, and set into a hole in the ground that had been ritually cleansed with the blood of a sacrificed sheep or pig.
The Termini were worshipped during the Terminalia on February 23rd.