terminus

Short definition from Wiktionary

Noun

1. 1
   The end or final point of something.
2. 2
   The end point of a transportation system, or the town or city in which it is located.
3. 3
   A boundary or border, or a post or stone marking such a boundary.

Proper noun

1. 1
   The god of boundaries and landmarks, focus of the important Roman festival of Terminalia.