A pile of things is a mass of them that is high in the middle and has sloping sides.

A pile of things is a quantity of things that have been put neatly somewhere so that each thing is on top of the one below.

Piles are wooden, concrete, or metal posts that are pushed into the ground and on which buildings or bridges are built. Piles are often used in very wet areas so that the buildings do not flood.

The pile of a carpet or of a fabric such as velvet is its soft surface. It consists of a lot of little threads standing on end.

If you pile up a quantity of things or if they pile up, they gradually form a pile.

If you pile up work, problems, or losses or if they pile up, you get more and more of them.

Someone who is at the bottom of the pile is low down in society or low down in an organization. Someone who is at the top of the pile is high up in society or high up in an organization.

If you pile things somewhere, you put them there so that they form a pile.

If something is piled with things, it is covered or filled with piles of things.

If a group of people pile into or out of a vehicle, they all get into it or out of it in a disorganized way.