Stack, v. t. [imp. & p. p.Stacked (stăkt); p. pr. & vb. n.Stacking.] [Cf. Sw. stacka, Dan. stakke. See Stack, n.] To lay in a conical or other pile; to make into a large pile; as, to stack hay, cornstalks, or grain; to stack or place wood.
To stack arms(Mil.), to set up a number of muskets or rifles together, with the bayonets crossing one another, and forming a sort of conical pile.