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trapdoor

   Also found in: Dictionary/thesaurus, Wikipedia 0.07 sec.

A secret way of gaining access to a program or online service. Trapdoors are built into the software by the original programmer as a way of gaining special access to particular functions. For example, a trapdoor built into a BBS program would allow access to any BBS computer running that software. See Easter Egg, Back Orifice and one-way hash function.


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The trapdoor had been left open, and I thought that was the place it came through.
The two beds--mere shelves covered with blankets not overclean--faced each other from opposite sides of the room, the little square trapdoor that had given access to the Chinaman's grave being midway between.
In a large dining room stood the table at which Louis XIV and his mistress Madame Maintenon, and after them Louis XV, and Pompadour, had sat at their meals naked and unattended--for the table stood upon a trapdoor, which descended with it to regions below when it was necessary to replenish its dishes.
 
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