'To pile arms' definitions:

Definition of 'To pile arms'

From: GCIDE

Pile \Pile\, v. t. [imp. & p. p. Piled; p. pr. & vb. n. Piling.]
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. [1913 Webster]
The labor of an age in piled stones. --Milton. [1913 Webster]
2. To cover with heaps; or in great abundance; to fill or overfill; to load. [1913 Webster]
To pile arms To pile muskets (Mil.), to place three guns together so that they may stand upright, supporting each other; to stack arms. [1913 Webster] Pileate