Meaning of pile driver

pile' driv"er

Pronunciation: [key]
  1. a machine for driving piles, usually composed of a tall framework in which either a weight is raised and dropped on a pile head or in which a steam hammer drives the pile.
  2. a person who operates such a machine.
  3. a person who hits or attacks forcefully or powerfully.
  4. a move whereby an opponent is turned upside down and slammed headfirst to the mat.
  5. a powerful stroke, hit, kick, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.