trapdoor

See also: trap door and trap-door

English

Alternative forms

• trap door, trap-door

Etymology

From trap +‎ door.

Pronunciation

• (Received Pronunciation) enPR: trăpdô, IPA^(key): /ˈtræpdɔː/
• (General American) enPR: trăpdôr, IPA^(key): /ˈtræpdɔɹ/

• Audio (Southern England):

  (file)

Noun

trapdoor (plural trapdoors)

1. A hinged or sliding door set into a floor or ceiling.
2. (theater) Such a trap set into the floor of a stage to allow fast exits and entrances.
3. (computing) A secret method of obtaining access to a program or online system; a backdoor.
4. (mathematics, cryptography) The special information that permits the inverse of a trapdoor function to be easily computed.
5. (mining) A door in a level for regulating the ventilating current; a weather door.

Synonyms

• drop

Derived terms

• trapdoor effect
• trapdoor spider

 

Translations

door set into floor or ceiling

• Afrikaans: valdeur
• Bulgarian: люк (bg) m (ljuk), капак на пода (kapak na poda)
• Catalan: trapa (ca) f, escotilla f
• Danish: lem (da) c, luge c
• Dutch: valluik (nl) n, valdeur (nl) f
• Esperanto: klapopordo, klappordo, plankpordo, plankopordo
• Finnish: luukku (fi)
• French: trappe (fr)
• Galician: zapón m, zapa, trapa f, trapela (gl) f
• German: Falltür (de) f
• Greek: καταπακτή (el) f (katapaktí)
• Hungarian: csapóajtó (hu)
• Icelandic: hleri (is) m, fallhleri m, hlemmur (is) m
• Italian: botola (it)
• Maori: kopani
• Norman: trappe f
• Norwegian:

  Bokmål: lem (no) m

• Polish: klapa (pl) f
• Portuguese: alçapão (pt)
• Russian: люк (ru) m (ljuk), лаз (ru) m (laz)
• Spanish: trampa (es), escotillón (es) m
• Swedish: fallucka (sv) c, lucka (sv) c

similar door on a stage

• Bulgarian: падаща врата f (padašta vrata)
• Catalan: trapa (ca) f
• Danish: faldlem (da) c
• Dutch: valluik (nl)
• Finnish: luukku (fi)
• Italian: botola (it) f
• Polish: zapadnia (pl) f
• Russian: люк (ru) m (ljuk)
• Swedish: fallucka (sv) c

secret access to a program

• Catalan: porta del darrere f
• Dutch: achterdeur (nl)
• Finnish: takaportti
• Russian: лазе́йка (ru) f (lazéjka)

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

Translations to be checked

• German: ^{(please verify)} Falltür (de) f
• Italian: ^{(please verify)} botola (it) f

Verb

trapdoor (third-person singular simple present trapdoors, present participle trapdooring, simple past and past participle trapdoored)

1. (cryptography, transitive) To subvert (a cryptographic scheme) by means of a secret parameter that makes the trapdoor function easy to compute.
2. (surgery, intransitive) To form a trapdoor deformity.