The rock or plank creating a step before an outer home
- the sill of a door; a horizontal little bit of timber or rock that forms the base of an entrance while offering support whenever driving through a doorway
- The rock or plank forming a step before an outer home.
1810, from home + action (n.).
(n.) The stone or plank forming one step before an outer door.
He stood on the doorstep and looked back into the house.