- Heap - Orderly pile - A large pile of hay, grain, straw, or the like, usually of a
nearly conical form, but sometimes rectangular or oblong, contracted at
the top to a point or ridge, and sometimes covered with thatch. - A pile of poles or wood, indefinite in quantity. - A pile of wood containing 108 cubic feet. - A number of flues embodied in one structure, rising above
the roof. Hence: - Any single insulated and prominent structure, or upright
pipe, which affords a conduit for smoke; as, the brick smokestack of a
factory; the smokestack of a steam vessel.