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We found 35 dictionaries with English definitions that include the word lack:
Click on the first link on a line below to go directly to a page where "lack" is defined.

General (29 matching dictionaries)

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

Business (1 matching dictionary)

28. lack: Legal dictionary [home, info]

Computing (1 matching dictionary)

29. lack: Encyclopedia [home, info]

Medicine (1 matching dictionary)

30. lack: online medical dictionary [home, info]

Miscellaneous (2 matching dictionaries)

31. LACK: Acronym Finder [home, info]
32. lack: Idioms [home, info]

Slang (1 matching dictionary)

33. lack: Urban Dictionary [home, info]

(Note: See lacks for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (lack) ▸ noun:  the state of needing something that is absent or unavailable ("There is a serious lack of insight into the problem") ▸ verb:  be without ("This soup lacks salt") ▸ name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #9221) ▸ Also see lacks ▸ Word origin ▸ Words similar to lack ▸ Usage examples for lack ▸ Idioms related to lack (New!) ▸ Popular adjectives describing lack ▸ Words that often appear near lack ▸ Rhymes of lack ▸ Invented words related to lack