Phrase guide

back door

adj · noun · verb · 17 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • Australia: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

The path of a pitch which starts outside and then slides over the plate.

Definition source: English Wiktionary via Wiktextract

Usage: US, not-comparable

Topics: ball-games, baseball, games, hobbies, lifestyle, sports

Examples

  • He has a nasty back door slider.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Achieved through indirect means.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Examples

  • Lately there's been a lot of back door pressure on me to step down.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Requiring consecutive cards on the turn and river to be achieved.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: card-games, poker

Examples

  • 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 had to fold.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A subsidiary entrance to a building or house at its rear, normally away from the street.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A means of access, often secret and unprotected, to something.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

A secret means of access to a program or system.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Qualifier: computer security

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

A rear side door of a car, or at the back of a van.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: automotive, transport, vehicles

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

The anus (usually in sexual practices).

Definition source: English Wiktionary via Wiktextract

Usage: countable, slang, uncountable

Examples

  • backdoor action
  • go up the back door

Meaning relationships

Synonyms: backgate

Antonyms: none provided

9

noun

Meaning 9

Anal sex.

Definition source: English Wiktionary via Wiktextract

Usage: broadly, slang, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

The rear side of the hole, furthest from the golfer.

Definition source: English Wiktionary via Wiktextract

Usage: countable, informal, uncountable

Topics: golf, hobbies, lifestyle, sports

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

verb

Meaning 11

To attempt to accomplish by indirect means, especially when direct means are proscribed.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

verb

Meaning 12

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.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: hobbies, lifestyle, sports, surfing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

verb

Meaning 13

To add a backdoor (a secret means of access) to a program or system.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Qualifier: computer security

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

14

verb

Meaning 14

To betray (someone); to double-cross (someone); to set (someone) up; to take advantage of (someone's) trust.

Definition source: English Wiktionary via Wiktextract

Usage: slang, transitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

15

noun

Meaning 15

a secret or underhand means of access (to a place or a position)

Definition source: Princeton WordNet 3.0

Examples

  • he got his job through the back door

Meaning relationships

Synonyms: backdoor

Antonyms: none provided

Broader terms: access

16

noun

Meaning 16

an entrance at the rear of a building

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: backdoor, back entrance

Antonyms: none provided

Broader terms: exterior door, outside door

17

noun

Meaning 17

an undocumented way to get access to a computer system or the data it contains

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: backdoor

Antonyms: none provided

Broader terms: access, access code

History

Etymology

No etymology was provided for this word.

Across languages

Translations

100 source translations are retained for this English entry.

  • Arabic: بَاب خَلْفِيّ (bāb ḵalfiyy) — subsidiary entrance to building
  • Belarusian: за́днія дзве́ры (zádnija dzvjéry) — subsidiary entrance to building
  • Bulgarian: за́ден вход (záden vhod) — subsidiary entrance to building
  • Chinese Cantonese: 後門 /后门 (hau6 mun4) — subsidiary entrance to building
  • Chinese Mandarin: 後門 /后门 (hòumén) — subsidiary entrance to building
  • Danish: bagdør — subsidiary entrance to building
  • Dutch: achterdeur — subsidiary entrance to building
  • Faroese: bakdyr — subsidiary entrance to building
  • Finnish: takaovi — subsidiary entrance to building
  • Finnish: sivuovi — subsidiary entrance to building
  • German: Hintertür — subsidiary entrance to building
  • Hungarian: hátsó ajtó/bejárat — subsidiary entrance to building
  • Italian: porta di dietro — subsidiary entrance to building
  • Italian: porta di servizio — subsidiary entrance to building
  • Italian: porta sul retro — subsidiary entrance to building
  • Japanese: 裏口 (uraguchi) — subsidiary entrance to building
  • Japanese: 裏戸 (urado) — subsidiary entrance to building
  • Japanese: 裏門 (uramon) — subsidiary entrance to building
  • Korean: 뒷문 (dwinmun) — subsidiary entrance to building
  • Korean: 후문 (humun) — subsidiary entrance to building
  • Latin: postīcum — subsidiary entrance to building
  • Macedonian: за́дна вра́та (zádna vráta) — subsidiary entrance to building
  • Macedonian: за́ден влез (záden vlez) — subsidiary entrance to building
  • Norwegian Bokmål: bakdør — subsidiary entrance to building
  • Norwegian Nynorsk: bakdør — subsidiary entrance to building
  • Polish: tylne drzwi — subsidiary entrance to building
  • Portuguese: porta dos fundos — subsidiary entrance to building
  • Portuguese: porta traseira — subsidiary entrance to building
  • Portuguese: porta de trás — subsidiary entrance to building
  • Portuguese: porta do cavalo — subsidiary entrance to building
  • Russian: за́дняя дверь (zádnjaja dverʹ) — subsidiary entrance to building
  • Russian: за́дний вход (zádnij vxod) — subsidiary entrance to building
  • Spanish: puerta trasera — subsidiary entrance to building
  • Spanish: puerta de atrás — subsidiary entrance to building
  • Swedish: bakdörr — subsidiary entrance to building
  • Ukrainian: за́дні две́рі (zádni dvéri) — subsidiary entrance to building
  • Welsh: drws cefn — subsidiary entrance to building
  • Belarusian: чо́рны ход (čórny xod) — secret, unprotected means of access
  • Belarusian: патайны́я дзве́ры (patajnýja dzvjéry) — secret, unprotected means of access
  • Chinese Cantonese: 後門 /后门 (hau6 mun4) — secret, unprotected means of access
  • Chinese Mandarin: 後門 /后门 (hòumén) — secret, unprotected means of access
  • Danish: bagdør — secret, unprotected means of access
  • Dutch: achterdeur — secret, unprotected means of access
  • Finnish: takaovi — secret, unprotected means of access
  • Finnish: takaportti — secret, unprotected means of access
  • German: Hintertür — secret, unprotected means of access
  • Greek: κερκόπορτα (kerkóporta) — secret, unprotected means of access
  • Hungarian: kiskapu — secret, unprotected means of access
  • Hungarian: kerülőút — secret, unprotected means of access
  • Icelandic: leynilegur — secret, unprotected means of access
  • Icelandic: laumulegur — secret, unprotected means of access
  • Japanese: 裏口 (uraguchi) — secret, unprotected means of access
  • Japanese: 裏戸 (urado) — secret, unprotected means of access
  • Japanese: 裏口 (katteguchi) — secret, unprotected means of access
  • Japanese: 裏門 (uramon) — secret, unprotected means of access
  • Korean: 뒷문 (dwinmun) — secret, unprotected means of access
  • Norwegian Bokmål: bakdør — secret, unprotected means of access
  • Norwegian Nynorsk: bakdør — secret, unprotected means of access
  • Polish: tylne drzwi — secret, unprotected means of access
  • Portuguese: porta dos fundos — secret, unprotected means of access
  • Russian: чёрный ход (čórnyj xod) — secret, unprotected means of access
  • Russian: потайна́я дверь (potajnája dverʹ) — secret, unprotected means of access
  • Ukrainian: чо́рний хід (čórnyj xid) — secret, unprotected means of access
  • Ukrainian: потайні́ две́рі (potajní dvéri) — secret, unprotected means of access
  • Danish: bagdør — computing: secret means of access
  • Finnish: takaportti — computing: secret means of access
  • German: Backdoor — computing: secret means of access
  • Italian: backdoor — computing: secret means of access
  • Japanese: バックドア (bakkudoa) — computing: secret means of access
  • Korean: 백도어 (baekdo'eo) — computing: secret means of access
  • Polish: backdoor — computing: secret means of access
  • Portuguese: backdoor — computing: secret means of access
  • Russian: бэкдо́р (bɛkdór) — computing: secret means of access
  • Russian: чёрный ход (čórnyj xod) — computing: secret means of access
  • Russian: лазе́йка (lazéjka) — computing: secret means of access
  • Danish: bagdør — automotive: rear door
  • Finnish: takaovi — automotive: rear door
  • Finnish: takaluukku — automotive: rear door
  • German: hintere Seitentür — automotive: rear door
  • German: Hecktür — automotive: rear door
  • Polish: tylne drzwi — automotive: rear door
  • Portuguese: porta traseira — automotive: rear door
  • Portuguese: porta de trás — automotive: rear door
  • Swedish: baksätesdörr — automotive: rear door
  • Belarusian: ду́па (dúpa) — slang: anus
  • Bulgarian: гъз (gǎz) — slang: anus
  • Chinese Cantonese: 後庭 /后庭 (hau6 ting4) — slang: anus
  • Chinese Mandarin: 後庭 /后庭 (hòutíng) — slang: anus
  • Chinese Mandarin: 後門 /后门 (hòumén) — slang: anus
  • Finnish: takaovi — slang: anus
  • Macedonian: газ (gaz) — slang: anus
  • Polish: tyłek — slang: anus
  • Russian: жо́па (žópa) — slang: anus
  • Ukrainian: ду́па (dúpa) — slang: anus
  • Finnish: tunkeutua — to attempt to accomplish by indirect means
  • Italian: ottenere per vie traverse — to attempt to accomplish by indirect means
  • Polish: robić potajemnie — to attempt to accomplish by indirect means
  • Polish: zrobić potajemnie — to attempt to accomplish by indirect means
  • Vietnamese: đi cửa sau — to attempt to accomplish by indirect means
  • Vietnamese: chạy cửa sau — to attempt to accomplish by indirect means