abutment

(countable, uncountable) The point of junction between two things, in particular a support, that abuts.
(countable, uncountable) The solid portion of a structure that supports the lateral pressure of an arch or vault.
(countable, uncountable) A construction that supports the ends of a bridge; a structure that anchors the cables on a suspension bridge.
(countable, uncountable) The part of a valley or canyon wall against which a dam is constructed.
(countable, uncountable) Something that abuts, or on which something abuts.
(countable, uncountable) The state of abutting.
(countable, uncountable) That element that shares a common boundary or surface with its neighbor.
(countable, uncountable) The tooth that supports a denture or bridge.
(countable, uncountable) A fixed point or surface where resistance is obtained.