[pahyl] 
noun, verb, piled, pil⋅ing.| 1. | an assemblage of things laid or lying one upon the other: a pile of papers; a pile of bricks. |
| 2. | Informal. a large number, quantity, or amount of anything: a pile of work. |
| 3. | a heap of wood on which a dead body, a living person, or a sacrifice is burned; pyre. |
| 4. | a lofty or large building or group of buildings: the noble pile of Windsor Castle. |
| 5. | Informal. a large accumulation of money: They made a pile on Wall Street. |
| 6. | a bundle of pieces of iron ready to be welded and drawn out into bars; fagot. |
| 7. | reactor (def. 4). |
| 8. | Electricity. voltaic pile. |
| 9. | to lay or dispose in a pile (often fol. by up): to pile up the fallen autumn leaves. |
| 10. | to accumulate or store (often fol. by up): to pile up money; squirrels piling up nuts against the winter. |
| 11. | to cover or load with a pile: He piled the wagon with hay. |
| 12. | to accumulate, as money, debts, evidence, etc. (usually fol. by up). |
| 13. | Informal. to move as a group in a more or less confused, disorderly cluster: to pile off a train. |
| 14. | to gather, accumulate, or rise in a pile or piles (often fol. by up): The snow is piling up on the roofs. |
| pile 1 (pīl) n.
v. tr.
pile up
[Middle English, from Old French, from Latin pīla, pillar.] |
pile (pīl)
n.
A hemorrhoid.
pile up
Accumulate, as in The leaves piled up in the yard, or He piled up a huge fortune. In this idiom pile means "form a heap or mass of something." [Mid-1800s]
Be involved in a crash, as in When the police arrived, at least four cars had piled up. [Late 1800s]