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

General (33 matching dictionaries)

1. lost: Merriam-Webster.com [home, info]
2. lost, lost: Oxford Learner's Dictionaries [home, info]
3. lost: American Heritage Dictionary of the English Language [home, info]
4. lost: Collins English Dictionary [home, info]
5. lost: Vocabulary.com [home, info]
6. lost, lost: Macmillan Dictionary [home, info]
7. Lost, lost: Wordnik [home, info]
8. lost: Cambridge Advanced Learner's Dictionary [home, info]
9. lost: Wiktionary [home, info]
10. lost: Webster's New World College Dictionary, 4th Ed. [home, info]
11. lost: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. lost: Infoplease Dictionary [home, info]
13. lost: Dictionary.com [home, info]
14. lost (adj.): Online Etymology Dictionary [home, info]
15. Lost, lost: UltraLingua English Dictionary [home, info]
16. lost: Cambridge Dictionary of American English [home, info]
17. lost, lost: Cambridge International Dictionary of Idioms [home, info]
18. LOST, Lost(TV series), Lost (8Ball album), Lost (Coldplay song), Lost (Cool Calm Pete album), Lost (Dermot Kennedy song), Lost (Faith Hill song), Lost (Frank Ocean song), Lost (Gorilla Zoe song), Lost (Lasgo song), Lost (Maguire novel), Lost (Menudo song), Lost (Michael Buble song), Lost (RTZ album), Lost (Robotham novel), Lost (Roger Sanchez song), Lost (Season 6), Lost (Stargate Universe), Lost (TV series), Lost (band), Lost (game show), Lost (season Lost+++(season+++1)), Lost (season 2), Lost (season 3), Lost (season 4), Lost (season 5), Lost (season 6), Lost (show), Lost (video game), Lost, Lost, The Lost (Class), The Lost (Durst novel), The Lost (New England band), The Lost (band), The Lost (video game), The Lost: Wikipedia, the Free Encyclopedia [home, info]
19. Lost: Online Plain Text English Dictionary [home, info]
20. lost: Webster's Revised Unabridged, 1913 Edition [home, info]
21. lost: Rhymezone [home, info]
22. lost: AllWords.com Multi-Lingual Dictionary [home, info]
23. lost: Webster's 1828 Dictionary [home, info]
24. LOST: Stammtisch Beau Fleuve Acronyms [home, info]
25. lost: Free Dictionary [home, info]
26. lost: Mnemonic Dictionary [home, info]
27. lost: WordNet 1.7 Vocabulary Helper [home, info]
28. lost: LookWAYup Translating Dictionary/Thesaurus [home, info]
29. lost: Dictionary/thesaurus [home, info]
30. lost: Wikimedia Commons US English Pronunciations [home, info]
31. Lost (TV Series): Wikipedia, the Free Encyclopedia [home, info]

Art (1 matching dictionary)

32. lost: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (4 matching dictionaries)

33. lost: Glossary of Legal Terms [home, info]
34. LOST: Bouvier's Law Dictionary 1856 Edition [home, info]
35. Lost (album), Lost (film), The Lost, lost: Legal dictionary [home, info]
36. Lost (disambiguation): Legal dictionary [home, info]

Computing (1 matching dictionary)

37. lost: Encyclopedia [home, info]

Medicine (1 matching dictionary)

38. lost: online medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

39. Lost: Brilliant Dream Dictionary [home, info]
40. LOST: Acronym Finder [home, info]
41. LOST: AbbreviationZ [home, info]
42. lost: Idioms [home, info]

Slang (1 matching dictionary)

43. L.O.S.T, LOST, Lost (MK): Urban Dictionary [home, info]

(Note: See losing for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (lost) ▸ noun:  people who are destined to die soon ▸ adjective:  no longer in your possession or control; unable to be found or recovered ("A lost child") ▸ adjective:  spiritually or physically doomed or destroyed ("Lost souls") ▸ adjective:  not gained or won ("A lost battle") ▸ adjective:  incapable of being recovered or regained ("His lost honor") ▸ adjective:  not caught with the senses or the mind ("Words lost in the din") ▸ adjective:  unable to function; without help ▸ adjective:  no longer known; irretrievable ("A lost art") ▸ adjective:  having lost your bearings; confused as to time or place or personal identity ▸ adjective:  perplexed by many conflicting situations or statements; filled with bewilderment ("She felt lost on the first day of school") ▸ Also see losing ▸ Word origin ▸ Words similar to lost ▸ Usage examples for lost ▸ Idioms related to lost (New!) ▸ Popular adjectives describing lost ▸ Popular nouns described by lost ▸ Words that often appear near lost ▸ Rhymes of lost ▸ Invented words related to lost