abutment

noun

1. (countable, uncountable)The point of junction between two things, in particular a support, that abuts.
2. (countable, uncountable)The solid portion of a structure that supports the lateral pressure of an arch or vault.
3. (countable, uncountable)A construction that supports the ends of a bridge; a structure that anchors the cables on a suspension bridge.

   “Each of the bridges consists of six separate girder spans on brick abutments.”

4. (countable, uncountable)The part of a valley or canyon wall against which a dam is constructed.

   “Heavy rains have caused the dam's abutments to seep, raising concern over possible dam failure.”

5. (countable, uncountable)Something that abuts, or on which something abuts.
6. (countable, uncountable)The state of abutting.
7. (countable, uncountable)That element that shares a common boundary or surface with its neighbor.
8. (countable, uncountable)The tooth that supports a denture or bridge.
9. (countable, uncountable)A fixed point or surface where resistance is obtained.

   “The fulcrum acted as an abutment.”