Definition of back door in English:

back door

Syllabification: back door


  • 1The door or entrance at the back of a building.
    More 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.
    More 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] Back to top  
  • (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.

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Word of the day skosh
Pronunciation: skōSH
a small amount; a little