Where touch happens and stress is passed onward.
(1) It's like a meeting-place for stresses.
Usually this means a structure at either end of a bridge that supports the superstructure. It is often composed of stone, concrete, brick, or timber.
(2) An abrupt interruption to a short trail such as the superstructure-supporting contrivance at either end of a bridge.
(3) The part of a structure supporting the end of a span or accepting force transferred through an arch. Hey.
(4) The end of, and the load-carrying supports on a bridge.
(5) A short rest which uses the butt cheeks for support, i.e., a "butt moment", also known as a "butt minute".