trapdoor

See also: trap door and trap-door

English

Alternative forms

Etymology

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.[1]

Synonyms

Derived terms

Translations
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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.

References
  1. Rossiter W[orthington] Raymond (1881) “Trapdoor”, in A Glossary of Mining and Metallurgical Terms. […], Easton, Pa.: [American] Institute [of Mining Engineers], […], →OCLC.
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