Definition: State of abutting.
Definition: That on or against which a body abuts or presses
Definition: The solid part of a pier or wall, etc., which receives
the thrust or lateral pressure of an arch, vault, or strut.
Definition: A fixed point or surface from which resistance or
reaction is obtained, as the cylinder head of a steam engine, the
fulcrum of a lever, etc.
Definition: In breech-loading firearms, the block behind the barrel
which receives the pressure due to recoil.
