Word.ws English Dictionary

back door

back door noun: a subsidiary entrance to a building or house at its rear, normally away from the street.

Noun

back door (countable and uncountable, plural back doors)

  1. A subsidiary entrance to a building or house at its rear, normally away from the street.
    • "Charles II, who was crowned here a little while before, occupied an old house (which is still standing) in New Street [Worcester], from which he escaped by the back door, as the enemy rushed in at the front."2023 January 11, Stephen Roberts, “Bradshaw's Britain: castles and cathedrals”, in RAIL, number 974, page 57
  2. A means of access, often secret and unprotected, to something.
    • Scoring three goals at home should guarantee you three points, but when you go on the attack a little bit more, you leave the back door open. That's not always a good idea with this team.2021 November 29, Alan Shearer, “Why Newcastle have to win their next two games to give them hope of staying in the Premier League - Alan Shearer analysis”, in BBC Sport
  3. (computer security) 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. (slang) The anus (usually in sexual practices).
    • backdoor action
    • go up the back door
    Synonyms:
    backgate
  6. (broadly, slang, uncountable) Anal sex.
    • Oh, don't be so judgmental. You could use a little back door.1998 June 28, Michael Patrick King, “Valley of the Twenty-Something Guys”, in Sex and the City, season 1, episode 4, spoken by Samantha
  7. (informal) The rear side of the hole, furthest from the golfer.
    • Sometimes the ball will curve around and enter from the back-door.2010, Bob Glanville, Golf: The Game of Lessening Failures, page 14

Adjective

back door (not comparable)

  1. (US) The path of a pitch which starts outside and then slides over the plate.
    • He has a nasty back door slider.
  2. Achieved through indirect means.
    • Lately there's been a lot of back door pressure on me to step down.
  3. Requiring consecutive cards on the turn and river to be achieved.
    • The flop had the ace of spades, queen of spades, and two of diamonds, and I was holding the king of spades and the three of hearts. I bet big, hoping for a jack and a ten to make my back door straight-draw, or a spade to make my back door flush-draw. But when the turn card was the five of clubs, I...

Verb

back door (third-person singular simple present back doors, present participle back dooring, simple past and past participle back doored)

  1. To attempt to accomplish by indirect means, especially when direct means are proscribed.
  2. (transitive) To enter a tube by accelerating from behind; to surf into an already formed hollow wave, in contrast to the normal method of slowing to allow a surfable wave to form.
    • If you survive the heavy take-off at 'The Chair' (which is very close to the rocks) you will find you're in 'The Suck-up', which offers either a spectacular barrel or a bonecrunching wipeout, but you might find you have to back door it.1999, Mark Warren, Mark Warren's Atlas of Australian Surfing, traveller's, →ISBN, page 103
  3. (transitive, computer security) To add a backdoor (a secret means of access) to a program or system.
    • Now that we have backdoored the notepad.exe binary, we will go back to the Meterpreter session and upload our backdoor: 3. Then, we need to start a listener so we. meterpreter > upload notepad-backdoored.exe [*] uploading[…]2018 February 26, Abhinav Singh, Nipun Jaswal, Monika Agarwal, Daniel Teixeira, Metasploit Penetration Testing Cookbook: Evade antiviruses, bypass firewalls, and exploit complex environments with the...
    • As an example, the generation algorithm for backdoored Dual EC picks a fixed group element Q, a random exponent d, and outputs as public key the pair P = Qd and Q. The secret key is d. (We use multiplicative notation for simplicity.)[…]2015 April 13, Elisabeth Oswald, Marc Fischlin, Advances in Cryptology – EUROCRYPT 2015: 34th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Sofia...
  4. (slang, transitive) To betray (someone); to double-cross (someone); to set (someone) up; to take advantage of (someone's) trust.

back door meaning in Tamil, Punjabi, Arabic and Vietnamese

back door in Tamil

புழைக்கடை வாயில், பின்வாசல், பின் கதவு

back door in Punjabi

back door
ਖਿੜਕੀ khiṛkī

back door in Arabic

subsidiary entrance to building
بَاب خَلْفِيّ bāb ḵalfiyy

back door in Vietnamese

to attempt to accomplish by indirect means
đi cửa sau, chạy cửa sau

Synonyms of back door

Antonyms

Forms of back door

Noun
pluralback doors
alternative formbackdoor
alternative formback-door
Verb
third-person singular presentback doors
present participleback dooring
past participleback doored
pastback doored

Questions about back door

What does back door mean?
Back door means a subsidiary entrance to a building or house at its rear, normally away from the street.
What is back door in Tamil?
Back door in Tamil is புழைக்கடை வாயில், பின்வாசல், பின் கதவு. See Back door meaning in Tamil.
What part of speech is back door?
Back door can be a noun, an adjective or a verb.
What is the plural of back door?
The plural of back door is back doors.

Words near back door in the dictionary

  1. back day
  2. back days
  3. back dirt
  4. back dive
  5. back dives
  6. back door
  7. back door slider
  8. back door sliders
  9. back doored
  10. back dooring
  11. back doors

Source and license

Adapted from Wiktionary: back door (page history and authors); back door (Tamil Wiktionary) (page history and authors); ਖਿੜਕੀ (Punjabi) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: En-au-back door.ogg.

Cite this entry: “back door.” Word.ws, https://word.ws/back_door. Based on Wiktionary, CC BY-SA 4.0.