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trapdoor

or trap door

[trap-dawr, -dohr]
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noun
  1. a door flush with the surface of a floor, ceiling, or roof.
  2. the opening that it covers.
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adjective
  1. of, relating to, or like a trapdoor.
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Origin of trapdoor

First recorded in 1325–75, trapdoor is from the Middle English word trappe dore. See trap1, door
Also called drop.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for trap door

trap door

noun
  1. a door or flap flush with and covering an opening, esp in a ceiling
  2. the opening so covered
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012