1. A wedge inserted beneath a door to hold it open at a desired position.
2. A weight or spring that prevents a door from slamming.
3. A rubber-tipped projection attached to a wall to protect it from the impact of an opening door.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.