Other forms: doorsteps
A doorstep is the step immediately outside your front door. Where the milk was left, and where you stand hunting for keys.
It carries a strong sense of the line between inside and out, which is why so much idiom lives there: on your doorstep means very close indeed, and a problem left on your doorstep is one somebody else has made yours. Journalists use it as a verb, and to doorstep somebody is to arrive unannounced at their house with a camera. British English also calls a very thick slice of bread a doorstep.
1noundoorstepThe step or area immediately outside a front door.
“She left the parcel on the doorstep.”
From door + step.
Etymology from Wiktionary, CC BY-SA