Definitions
1.NounAn outside step leading up to the door of a building, usually a home.
2.NounOne's immediate neighbourhood or locality."They want to build the prison right on our doorstep; it will only be half a mile away and being that close scares me."
3.NounA thick slice, especially of bread.
4.VerbTo visit one household after another to solicit sales, charitable donations, political support, etc.
5.VerbTo corner somebody for an unexpected interview.