Back door may refer to:
- A door in the rear of a house or other building
- Backdoor (computing), a hidden method for bypassing normal computer authentication systems
- Back Door (jazz trio), a British group
- The Back Door (fiction), an 1897 work serialised in Hong Kong newspaper The China Mail
- The Back Door (album), a 1992 album by American band Cherish the Ladies
- Backdoor (basketball), a play in which a player gets behind the defense and receives a pass for an easy score
- Backdoor Bay, Ross Island, Antarctica
Famous quotes containing the word door:
“To set up as a standard of public morality a notion which can neither be defined nor conceived is to open the door to every kind of tyranny.”
—Simone Weil (1909–1943)