trapdoor

Fetched 2026-10-26 (cache).

Synonyms: trap door, trap-door, trappour, tandoor, trapdoors

Antonyms: trap door, trap-door, trappour, tandoor, trapdoors

Related words from Datamuse; suggestions, not definitions.

Noun

1. A [[hinged]] or [[sliding]] [[door]] set into a [[floor]] or [[ceiling]].
2. {{lb|en|theater}} Such a [[trap]] set into the floor of a [[stage]] to allow fast [[exit]]s and [[entrance]]s.
3. {{lb|en|computing}} A [[secret]] method of obtaining [[access]] to a [[program]] or [[online]] [[system]]; a [[backdoor]].
4. {{lb|en|mathematics|cryptography}} The special information that permits the [[inverse]] of a [[trapdoor function]] to be easily computed.
5. {{lb|en|mining}} A door in a [[level]] for regulating the ventilating current; a [[weather door]].<ref>{{R:Raymond Glossary}}</ref>
6. {{lb|en|firearms}} A folding [[bolt]] in a [[rifle]] that flips up and forward to allow the [[cartridge]] to be loaded in the [[breech]].

Verb

1. {{lb|en|cryptography|transitive}} To [[subvert]] (a cryptographic scheme) by means of a secret parameter that makes the [[trapdoor function]] easy to compute.
2. {{lb|en|surgery|intransitive}} To form a [[trapdoor deformity]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.