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We found 31 dictionaries with English definitions that include the word impenetrable:
Click on the first link on a line below to go directly to a page where "impenetrable" is defined.

General dictionaries General (27 matching dictionaries)
  1. impenetrable: Merriam-Webster.com [home, info]
  2. impenetrable: Oxford Dictionaries [home, info]
  3. impenetrable: American Heritage Dictionary of the English Language [home, info]
  4. impenetrable: Collins English Dictionary [home, info]
  5. impenetrable: Vocabulary.com [home, info]
  6. impenetrable: Macmillan Dictionary [home, info]
  7. Impenetrable, impenetrable: Wordnik [home, info]
  8. impenetrable: Cambridge Advanced Learner's Dictionary [home, info]
  9. impenetrable: Wiktionary [home, info]
  10. impenetrable: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. impenetrable: The Wordsmyth English Dictionary-Thesaurus [home, info]
  12. impenetrable: Infoplease Dictionary [home, info]
  13. Impenetrable, impenetrable: Dictionary.com [home, info]
  14. impenetrable: UltraLingua English Dictionary [home, info]
  15. impenetrable: Cambridge Dictionary of American English [home, info]
  16. Impenetrable: Online Plain Text English Dictionary [home, info]
  17. impenetrable: Webster's Revised Unabridged, 1913 Edition [home, info]
  18. impenetrable: Rhymezone [home, info]
  19. impenetrable, impenetrable, impntrable: AllWords.com Multi-Lingual Dictionary [home, info]
  20. impenetrable: Webster's 1828 Dictionary [home, info]
  21. impenetrable: Free Dictionary [home, info]
  22. impenetrable: Mnemonic Dictionary [home, info]
  23. impenetrable: WordNet 1.7 Vocabulary Helper [home, info]
  24. impenetrable: LookWAYup Translating Dictionary/Thesaurus [home, info]
  25. impenetrable: Dictionary/thesaurus [home, info]

Business dictionaries Business (1 matching dictionary)
  1. impenetrable: Legal dictionary [home, info]

Computing dictionaries Computing (1 matching dictionary)
  1. impenetrable: Encyclopedia [home, info]

Medicine dictionaries Medicine (1 matching dictionary)
  1. impenetrable: online medical dictionary [home, info]

Slang dictionaries Slang (1 matching dictionary)
  1. Impenetrable: Urban Dictionary [home, info]

(Note: See impenetrably for more definitions.)

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (impenetrable)

adjective:  not admitting of penetration or passage into or through ("An impenetrable fortress")
adjective:  impossible to understand ("Impenetrable jargon")
adjective:  permitting little if any light to pass through because of denseness of matter ("Impenetrable gloom")

▸ Also see impenetrably

Words similar to impenetrable

Usage examples for impenetrable

Popular nouns described by impenetrable

Words that often appear near impenetrable

Rhymes of impenetrable

Invented words related to impenetrable

Phrases that include impenetrable:   el impenetrable national park, impenetrable fortress more...

Words similar to impenetrable:   dense, heavy, impenetrably, more...

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