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back door

back door

16 5.9
A secret way to enter a system or place by avoiding security
  • noun
  • /bæk dɔr/
translation icon : puerta trasera
  • On a trip a few years ago, I discovered a back door and have used it whenever I travel.

And we got into it through a back door.

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Examples

  • There was also what appeared to be a secret back door.

    Academic text (2005)
  • If someone leaves a back door open, it's a bit daft not to try and use it.

  • It's law by the back door is what it is.

  • Then they got us out the back door of the of the airport as well.

  • "The effect works like an extra tax, a sort of property tax by the back door."

    Blog text (6)
  • I have access to the entire Stark Global Security network, including multiple defense satellites, as well as back doors to all major telecommunication networks.

  • The beast I am referring to is unwittingly opening a back door to your site to potential hackers.

    Blog text (32)
  • The Usurper, by finding a back door to the Oval Office, has ended consensual government in the USA.

    Blog text (29)
  • New Cisco "smart" routers seem to have a back door for Cisco to remotely install "upgrades."

    Blog text (8)
  • The company was concerned that hackers had discovered a back door into their software system.

Synonyms

backdoor
vsback door
12 7.0

A secret way to get into a group or position without following normal rules

is the same idea but written as two separate words
back channel
vsback door
  • Literature
4 7.7

A secret way to talk privately between governments or leaders

covers secret entry or influence beyond only private communication
trapdoor
vsback door
  • Specialized
2 8.0

A hidden way in a computer program that lets someone get in without permission

is a general secret access method, not limited to technical vulnerabilities
back-channel
vsback door
1 7.9

Secret talks that happen outside normal channels

applies to secret access broadly, not only talks or negotiations

Antonyms

A usual way of doing something that people follow in a situation

How Official

authorization
  • Specialized
14 4.3
back door
16 5.9

Surface Forms

back door singular
back doors plural
backdoors plural
backdoor singular

Morphology

back + door

The constituent meanings 'back' (rear) + 'door' (entrance) directly suggest a rear or less-visible entrance, and this physical image readily extends to the idea of an unofficial or secret route, so learners who know the words can often infer the basic sense. However, the use as an abstract method for bypassing rules is a metaphorical extension rather than a strictly compositional meaning, so it may not be fully predictable to a B1 learner without some exposure.

Etymology

Back door for a secret entry comes from the idea of a real rear door: the words back and door make the image of a quiet, hidden way in. So a computer or system 'back door' is a 'secret way in' that avoids the normal rules.