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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 (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 (4 matching dictionaries)

29. intrusion: BusinessDictionary.com [home, info]
30. intrusion, Intrusion (geology): Legal dictionary [home, info]
31. INTRUSION: Bouvier's Law Dictionary 1856 Edition [home, info]
32. intrusion: Glossary of Legal Terms [home, info]

Computing (2 matching dictionaries)

33. intrusion, Intrusion (geology): Encyclopedia [home, info]
34. intrusion: Webster's New World Hacker Dictionary [home, info]

Medicine (3 matching dictionaries)

35. intrusion, Intrusion (geology): Medical dictionary [home, info]
36. intrusion: online medical dictionary [home, info]
37. Intrusion: Orthodontic Terms [home, info]

Religion (1 matching dictionary)

38. Intrusion: Catholic Encyclopedia [home, info]

Science (2 matching dictionaries)

39. intrusion: Natural History Terms [home, info]
40. intrusion: Dictionary of Geology [home, info]

Tech (3 matching dictionaries)

41. INTRUSION: Space and Electronic Warfare Lexicon [home, info]
42. intrusion: DOD Dictionary of Military Terms [home, info]
43. Intrusion: AUTOMOTIVE TERMS [home, info]

(Note: See intrusions for more definitions.)

Quick definitions from Macmillan ( ) Provided by 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 ▸ Also see intrusions ▸ Word origin ▸ Words similar to intrusion ▸ Usage examples for intrusion ▸ Popular adjectives describing intrusion ▸ Words that often appear near intrusion ▸ Rhymes of intrusion ▸ Invented words related to intrusion