Word.ws English Dictionary

trapdoor

/ˈtræpdɔː/US/ˈtræpdoɹ/

trapdoor noun: a hinged or sliding door set into a floor or ceiling.

Noun

trapdoor (plural trapdoors)

  1. A hinged or sliding door set into a floor or ceiling.
  2. Such a trap set into the floor of a stage to allow fast exits and entrances.
  3. A secret method of obtaining access to a program or online system; a backdoor.
  4. The special information that permits the inverse of a trapdoor function to be easily computed.
  5. A door in a level for regulating the ventilating current; a weather door.

Verb

trapdoor (third-person singular simple present trapdoors, present participle trapdooring, simple past and past participle trapdoored)

  1. (transitive) To subvert (a cryptographic scheme) by means of a secret parameter that makes the trapdoor function easy to compute.
  2. (intransitive) To form a trapdoor deformity.

trapdoor meaning in Kannada and Odia

trapdoor in Kannada

ಕಳ್ಳದಾರಿ, ಜಾರುಬಾಗಿಲು

trapdoor in Odia

trapdoor
ଖିଡ଼ିକି khiṛiki

Synonyms of trapdoor

Forms of trapdoor

Noun
pluraltrapdoors
alternative formtrap door
alternative formtrap-door
Verb
third-person singular presenttrapdoors
present participletrapdooring
past participletrapdoored
pasttrapdoored

Origin of trapdoor

From trap + door.

Words formed from trapdoor

Phrases with trapdoor

Questions about trapdoor

What does trapdoor mean?
Trapdoor means a hinged or sliding door set into a floor or ceiling.
What is trapdoor in Kannada?
Trapdoor in Kannada is ಕಳ್ಳದಾರಿ, ಜಾರುಬಾಗಿಲು. See Trapdoor meaning in Kannada.
What part of speech is trapdoor?
Trapdoor can be a noun or a verb.
How do you pronounce trapdoor?
Trapdoor is pronounced /ˈtræpdɔː/ (UK).
What is the plural of trapdoor?
The plural of trapdoor is trapdoors.

Words near trapdoor in the dictionary

  1. trapans
  2. Trapasso
  3. Trapassos
  4. trapazoid
  5. trapball
  6. trapdoor
  7. trapdoor deformities
  8. trapdoor deformity
  9. trapdoor effect
  10. trapdoor function
  11. trapdoor functions

Source and license

Adapted from Wiktionary: trapdoor (page history and authors); trapdoor (Kannada Wiktionary) (page history and authors); ଖିଡ଼ିକି (Odia) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-trapdoor.wav.

Cite this entry: “trapdoor.” Word.ws, https://word.ws/trapdoor. Based on Wiktionary, CC BY-SA 4.0.