Definitions:
a heap of things laid or lying one on top of another

a large imposing building or group of buildings

a series of plates of dissimilar metals laid one on another alternately to produce an electric current.

a nuclear reactor.

place (things) one on top of the other

(of a group of people) get into or out of a vehicle or space in a disorganized manner

a heavy stake or post driven vertically into the bed of a river, soft ground, etc., to support the foundations of a superstructure.

a triangular charge or ordinary formed by two lines meeting at an acute angle, usually pointing down from the top of the shield.

strengthen or support (a structure) with piles

the soft projecting surface of a carpet or a fabric such as velvet or flannel, consisting of many small threads