An obstacle, barrier, or bulwark.
A barrier constructed across a road, especially as a military defence
A place of confrontation.
to close or block a road etc., using a barricade
to keep someone in (or out), using a blockade, especially ships in a port
A boundary or border, or a post or stone marking such a boundary.
The end point of a transportation system, or the town or city in which it is located.
The end or final point of something.