Meaning of “pile” - Learner’s Dictionary

pile

noun us uk /paɪl/
He left his clothes in a muddled pile in the corner.He hid the letter beneath a pile of papers.The wood is in neat piles with newspaper placed between.He was trapped beneath a pile of rubble.The shirts were placed in a neatly folded pile.

B1 [ C ] an amount of a substance in the shape of a small hill or a number of objects on top of each other:

a pile of books/bricks
a pile of sand/rubbish
The clothes were arranged in piles on the floor.
a pile of sth/piles of sth informal

B2 a lot of something:

It's all right for him, he's got piles of money.

(Definition of “pile” from the Cambridge Learner’s Dictionary © Cambridge University Press)