a·but·ment 
(ə-bŭtmənt)
(ə-bŭtmənt)n.
1. The act or process of abutting.
2.
a. Something that abuts.
b. The point of contact of two abutting objects or parts.
3.
a. The part of a structure that bears the weight or pressure of an arch.
b. A structure that supports the end of a bridge.
c. A structure that anchors the cables of a suspension bridge.