Stack

n. [Icel. stackr, a heap, heystackr, a heap of hay, Sw. stack, Dan. stak, a heap, pile of hay, Prov. Ger. stock, heustock, from the root of stick, Ger. stecken.]

1. A large pile of hay, grain, straw, and 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.
2. A pile of wood containing 108 cubic feet; also, a pile of poles or wood indefinite in quantity. [Eng.]

Against every pillar was a stack of billets above a man's height. Bacon.

3. A number of funnels or chimneys standing together.
4. A single chimney or passage-way for smoke; the chimney of a locomotive or 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 pile.

v. t. [imp. & p. p. STACKED (stăkt); p. pr. & vb. n. STACKING.] [Sw. stacka, Dan. stakke, Prov. Ger. stocken.]

1. To lay, as hay or grain, in a conical or other pile; to make into a large pile; as, to stack hay or grain.
2. To pile, as wood, poles, and the like. [Eng.]

To stack arms (Mil.), to set up muskets or rifles together, with the bayonets crossing one another, and forming a sort of conical pile.