PILE (6)

Pile, v. t. [imp. & p. p. Piled (?); p. pr. & vb. n. Piling.] 1. 1. To lay or throw into a pile or heap; to heap up; to collect into a mass; to accumulate; to amass; — often with up; as, to pile up wood. “Hills piled on hills.” Dryden. “Life piled on life.” Tennyson.
The labor of an age in piled stones. Milton. 2. 2. To cover with heaps; or in great abundance; to fill or overfill; to load.
To pile arms or muskets (Mil.), to place three guns together so that they may stand upright, supporting each other; to stack arms.