pile (Noun) — A collection of objects laid on top of each other.
pile (Noun) — (often followed by 'of') a large number, amount or extent. ex. "a pile of letters"
pile (Noun) — A large sum of money (especially as pay or profit). ex. "she made a pile selling real estate"
pile (Noun) — Fine soft dense hair (as the fine short hair of cattle or deer or the wool of sheep or the undercoat of certain dogs).
pile (Noun) — Battery consisting of voltaic cells arranged in series; the earliest electric battery devised by Volta.
pile (Noun) — A column of wood, steel or concrete that is driven into the ground to provide support for a structure.
pile (Noun) — The yarn (as in a rug, velvet or corduroy) that stands up from the weave. ex. "for uniform colour and texture tailors cut velvet with the pile running the same direction"
pile (Noun) — A nuclear reactor that uses controlled nuclear fission to generate energy.
pile (Verb) — Arrange in stacks. ex. "pile your books up on the shelves"
pile (Verb) — Press tightly together or cram.
pile (Verb) — Place or lay as if in a pile. ex. "The teacher piled work on the students until the parents protested"