pilepilepilespiledpiling2verb (piles, piling, piled)to put a lot of things on top of one another: She piled the boxes on the table.pilepilepiles1nouna lot of things on top of one another; a large amount of something: Clothes lay in piles on the floor.a pile of earthwhich word?Pile or heap? A pile may be tidy or untidy. A heap is untidy.