1. A collection of objects laid on top of each other; SYN. heap, mound.
2. A column of wood or steel or concrete that is driven into the ground to provide support for a structure; SYN. spile, piling, stilt.
3. Informal: a large sum of money.
4. The yarn (as in a rug or velvet) that stands up from the weave.
5. Upside-down wedge at an acute angle on a coat of arms
6. In nuclear physics, controlled arrangement of fissionable material for producing a chain reaction.

1. To lay or throw into a pile or heap; to heap up; to collect into a mass; to accumulate; to amass.
2. To cover with heaps; or in great abundance; to fill or overfill; to load.