# back door

> English word · Noun

## Definitions
1. A subsidiary entrance to a building or house at its rear, normally away from the street.
2. A means of access, often secret and unprotected, to something.
3. A secret means of access to a program or system.
4. A rear side door of a car, or at the back of a van.
5. The anus; (by extension) anal sex.
6. The rear side of the hole, furthest from the golfer.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/back-door