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We found 34 dictionaries with English definitions that include the word investigation:
Click on the first link on a line below to go directly to a page where "investigation" is defined.

General (29 matching dictionaries)

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

Business (2 matching dictionaries)

28. INVESTIGATION: Accounting Glossary [home, info]
29. investigation: Legal dictionary [home, info]

Computing (1 matching dictionary)

30. investigation: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

31. investigation: online medical dictionary [home, info]
32. investigation: Medical dictionary [home, info]

(Note: See investigatory for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (investigation) ▸ noun:  the work of inquiring into something thoroughly and systematically ▸ noun:  an inquiry into unfamiliar or questionable activities ▸ Also see investigatory ▸ Word origin ▸ Words similar to investigation ▸ Usage examples for investigation ▸ Popular adjectives describing investigation ▸ Words that often appear near investigation ▸ Rhymes of investigation ▸ Invented words related to investigation