Definition of back door in English:

Share this entry

back door

Pronunciation: /ˈˌbak ˈdô(ə)r/


1The door or entrance at the back of a building.
Example sentences
  • They pushed open the back doors and entered the building, passing by the control room and up the concrete back stairs, heading for their changing rooms.
  • Bob pried open one of the back doors to the building, and they all scrambled out into the cool night air.
  • Veon threw open his door and opened the back doors, grabbing his pistols and stuffing them into his belt.
1.1A feature or defect of a computer system that allows surreptitious unauthorized access to data.
Example sentences
  • Around the same time, Mydoom.A was infecting machines around the world, leaving a small backdoor to each infected computer.
  • Once downloaded, the victim unwittingly activates the backdoor by compiling Sendmail from source code.
  • It also attempts to open a backdoor on infected Windows PCs, allowing hackers to exploit compromised systems.


(also backdoor) [attributive]
(Of an activity) clandestine; underhanded: backdoor private deals
More example sentences
  • It seems to me it might be a back door attempt to get around the trial judge's findings of fact in this case.
  • It is a back door to privatisation and should be resisted by anyone who believes in the health service.
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.