noun, verb, -piled, -pil⋅ing.| 1. | a supply of material, as a pile of gravel in road maintenance. |
| 2. | a large supply of some metal, chemical, food, etc., gathered and held in reserve for use during a shortage or during a period of higher prices. |
| 3. | a quantity, as of munitions or weapons, accumulated for possible future use. |
| 4. | to accumulate (material, goods, or the like) for future use; put or store in a stockpile. |
| 5. | to accumulate in a stockpile. |