doorstop

(-stäp′)

noun

  1. a device used to hold a door open at a desired position or prevent it from closing too forcibly or slamming against a wall
  2. a thin wooden strip affixed to a frame of a doorway, against which the door closes

See doorstop in American Heritage Dictionary 4

noun
  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.

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