trapdoor.
A hinged or sliding door set into a floor or ceiling.
Meaning & usage
A hinged or sliding door set into a floor or ceiling.
Such a trap set into the floor of a stage to allow fast exits and entrances.
A secret method of obtaining access to a program or online system; a backdoor.
The special information that permits the inverse of a trapdoor function to be easily computed.
A door in a level for regulating the ventilating current; a weather door.
Where this word comes from
From trap + door.
To subvert (a cryptographic scheme) by means of a secret parameter that makes the trapdoor function easy to compute.
To form a trapdoor deformity.
Where this word comes from
From trap + door.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.