trapdoor

/ˈtræpˌdɔr/
noun
  1. A door set into a floor or ceiling, often hidden or flush with the surface.
    • He pulled the ring and lifted the trapdoor to the attic.
    • The magician disappeared through a trapdoor on the stage.
    • The old house had a trapdoor in the kitchen floor that led to the cellar.
  2. A secret or hidden way to access something, often used figuratively.
    • The website had a trapdoor that let developers see hidden settings.
    • The spy used a trapdoor in the wall to escape the room.
    • In the video game, a trapdoor opened when you solved the puzzle.
Synonyms
What does "trapdoor" mean? | whatsthatwordmean | whatsthatwordmean