What's "a pile of" mean and when's it used?
Native speaker’s answer
Rebecca
"A pile of [something]" refers to a heap or bunch of things laid on top of each other. You can use it when you want to say there's a group of one thing piled on each other. Ex: The pile of dishes in the kitchen won't clean themselves. Ex: There's a huge pile of laundry on my floor. Ex: The pile of books is for your sister.