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We found 45 dictionaries with English definitions that include the word intrusion:
Click on the first link on a line below to go directly to a page where "intrusion" is defined.

General dictionaries General (30 matching dictionaries)
  1. intrusion: Wikimedia Commons US English Pronunciations [home, info]
  2. intrusion: Dictionary/thesaurus [home, info]
  3. intrusion: LookWAYup Translating Dictionary/Thesaurus [home, info]
  4. intrusion: WordNet 1.7 Vocabulary Helper [home, info]
  5. intrusion: Mnemonic Dictionary [home, info]
  6. intrusion: Free Dictionary [home, info]
  7. intrusion: Webster's 1828 Dictionary [home, info]
  8. Intrusion: AllWords.com Multi-Lingual Dictionary [home, info]
  9. intrusion: Rhymezone [home, info]
  10. intrusion: Webster's Revised Unabridged, 1913 Edition [home, info]
  11. Intrusion: Online Plain Text English Dictionary [home, info]
  12. Intrusion, Intrusion (orthodontics), Intrusion (novel), Intrusion (geology), Intrusion (disambiguation): Wikipedia, the Free Encyclopedia [home, info]
  13. intrusion: Cambridge Dictionary of American English [home, info]
  14. intrusion: UltraLingua English Dictionary [home, info]
  15. intrusion: Online Etymology Dictionary [home, info]
  16. intrusion: Dictionary.com [home, info]
  17. intrusion: Infoplease Dictionary [home, info]
  18. intrusion: The Wordsmyth English Dictionary-Thesaurus [home, info]
  19. intrusion: Webster's New World College Dictionary, 4th Ed. [home, info]
  20. intrusion: Wiktionary [home, info]
  21. intrusion: Cambridge Advanced Learner's Dictionary [home, info]
  22. intrusion, Intrusion: Wordnik [home, info]
  23. intrusion: Macmillan Dictionary [home, info]
  24. intrusion: Vocabulary.com [home, info]
  25. intrusion: Collins English Dictionary [home, info]
  26. intrusion: American Heritage Dictionary of the English Language [home, info]
  27. intrusion: Oxford Dictionaries [home, info]
  28. intrusion: Merriam-Webster.com [home, info]

Business dictionaries Business (4 matching dictionaries)
  1. intrusion: BusinessDictionary.com [home, info]
  2. intrusion, Intrusion (geology): Legal dictionary [home, info]
  3. INTRUSION: Bouvier's Law Dictionary 1856 Edition [home, info]
  4. intrusion: Glossary of Legal Terms [home, info]

Computing dictionaries Computing (2 matching dictionaries)
  1. intrusion, Intrusion (geology): Encyclopedia [home, info]
  2. intrusion: Webster's New World Hacker Dictionary [home, info]

Medicine dictionaries Medicine (3 matching dictionaries)
  1. intrusion, Intrusion (geology): Medical dictionary [home, info]
  2. intrusion: online medical dictionary [home, info]
  3. Intrusion: Orthodontic Terms [home, info]

Religion dictionaries Religion (1 matching dictionary)
  1. Intrusion: Catholic Encyclopedia [home, info]

Science dictionaries Science (2 matching dictionaries)
  1. intrusion: Natural History Terms [home, info]
  2. intrusion: Dictionary of Geology [home, info]

Tech dictionaries Tech (3 matching dictionaries)
  1. INTRUSION: Space and Electronic Warfare Lexicon [home, info]
  2. intrusion: DOD Dictionary of Military Terms [home, info]
  3. Intrusion: AUTOMOTIVE TERMS [home, info]

(Note: See intrusions for more definitions.)

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (intrusion)

noun:  entrance by force or without permission or welcome
noun:  rock produced by an intrusive process
noun:  the forcing of molten rock into fissures or between strata of an earlier rock formation
noun:  any entry into an area not previously occupied
noun:  entry to another's property without right or permission

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Phrases that include intrusion:   electromagnetic intrusion, intrusion prevention system, intrusion detection, intrusion prevention, footwell intrusion, more...

Words similar to intrusion:   encroachment, invasion, trespass, violation, more...

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