'Doorstep' definitions:

Definition of 'doorstep'

From: WordNet
noun
The sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway [syn: doorsill, doorstep, threshold]

Definition of 'Doorstep'

From: GCIDE
  • Doorstep \Door"step`\, n. The stone or plank forming a step before an outer door. [1913 Webster]