'doorstop' definitions:

Definition of 'doorstop'

From: WordNet
noun
A stop that keeps open doors from moving [syn: doorstop, doorstopper]

Definition of 'doorstop'

From: GCIDE
  • doorstop \door"stop`\, n. (Carp.) The block or strip of wood or similar material which stops, at the right place, the shutting of a door; any object used to stop open doors from moving. [1913 Webster]