Stack n.
 1. A large and to some degree orderly 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.
    But corn was housed, and beans were in the stack.   --Cowper.
 2. Hence: An orderly pile of any type of object, indefinite in quantity; -- used especially of piles of wood.  A stack is usually more orderly than a pile
    Against every pillar was a stack of billets above a man's height.   --Bacon.
 3. Specifically: A pile of wood containing 108 cubic feet. [Eng.]
 5. Arch. (a) A number of flues embodied in one structure, rising above the roof. Hence: (b) 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.
 Stack of arms Mil., a number of muskets or rifles set up together, with the bayonets crossing one another, forming a sort of conical self-supporting pile.
 to blow one's stacks to become very angry and lose one's self-control, and especially to display one's fury by shouting.