• Trapdoor

    Alternative forms

    Origin

    trap + door

    Full definition of trapdoor

    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; weather door.

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