Pronunciation: (pil'yun), [key]
1. a pad or cushion attached behind a saddle, esp. as a seat for a woman.
2. a pad, cushion, saddle, or the like, used as a passenger seat on a bicycle, motor scooter, etc.
3. a passenger's saddle or seat behind the driver's seat on a motorcycle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.