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We found 48 dictionaries with English definitions that include the word ill:
Click on the first link on a line below to go directly to a page where "ill" is defined.

General (35 matching dictionaries)

1. I'll, Ill, ill: Merriam-Webster.com [home, info]
2. I'll, Ill, ill, the ill: Oxford Learner's Dictionaries [home, info]
3. I'll, Ill, ill, ill: American Heritage Dictionary of the English Language [home, info]
4. I'll, Ill, ill: Collins English Dictionary [home, info]
5. ill: Vocabulary.com [home, info]
6. Ill, ill, ill, ill, ill-: Macmillan Dictionary [home, info]
7. I'LL, I�ll, I''ll, I'll, Ill, Ill, Ill, i'l'l, i'll, ill, ill, ill: Wordnik [home, info]
8. I'll, i'll, ill, ill-: Cambridge Advanced Learner's Dictionary [home, info]
9. I'll, Ill, ill: Wiktionary [home, info]
10. I'll, ill: Webster's New World College Dictionary, 4th Ed. [home, info]
11. I'll, ill, ill: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. ill: Infoplease Dictionary [home, info]
13. I'll, ill, ill: Dictionary.com [home, info]
14. ill: Online Etymology Dictionary [home, info]
15. I'll, ill: UltraLingua English Dictionary [home, info]
16. ill: Cambridge Dictionary of American English [home, info]
17. ill: Cambridge International Dictionary of Idioms [home, info]
18. I'll, I'll (manga), I'll (singer), Ill (Austria), Ill (France), Ill (Vorarlberg), Ill (disambiguation), Ill: Wikipedia, the Free Encyclopedia [home, info]
19. Ill: Online Plain Text English Dictionary [home, info]
20. ill: Webster's Revised Unabridged, 1913 Edition [home, info]
21. ill: Rhymezone [home, info]
22. ill: AllWords.com Multi-Lingual Dictionary [home, info]
23. ill: Webster's 1828 Dictionary [home, info]
24. ILL, ill: Stammtisch Beau Fleuve Acronyms [home, info]
25. I'll: All About Homonyms [home, info]
26. Ill: 1911 edition of the Encyclopedia Britannica [home, info]
27. ill: Free Dictionary [home, info]
28. ill: Mnemonic Dictionary [home, info]
29. ill: WordNet 1.7 Vocabulary Helper [home, info]
30. ill: LookWAYup Translating Dictionary/Thesaurus [home, info]
31. I'll, Ill, ill: Dictionary/thesaurus [home, info]
32. ill: Wikimedia Commons US English Pronunciations [home, info]
33. Ill: Wordnik [home, info]

Art (2 matching dictionaries)

34. Ill: Glossary of Stamp Collecting Terms [home, info]
35. ILL: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (1 matching dictionary)

36. Ill (river), ill: Legal dictionary [home, info]

Computing (1 matching dictionary)

37. ill: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

38. ill: online medical dictionary [home, info]
39. Ill (river), ill: Medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

40. ILL: Acronym Finder [home, info]
41. ILL: Three Letter Words with definitions [home, info]
42. ILL: AbbreviationZ [home, info]
43. ill: Idioms [home, info]

Slang (2 matching dictionaries)

44. Ill: Totally Unofficial Rap [home, info]
45. Ill: Street Terms: Drugs and the Drug Trade [home, info]

Tech (1 matching dictionary)

46. Ill: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING [home, info]

(Note: See worst for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (ill) ▸ noun:  an often persistent bodily disorder or disease; a cause for complaining ▸ adjective:  indicating hostility or enmity ("You certainly did me an ill turn") ▸ adjective:  not in good physical or mental health ("Ill from the monotony of his suffering") ▸ adjective:  presaging ill-fortune ("Ill omens") ▸ adjective:  distressing ("Ill manners") ▸ adjective:  resulting in suffering or adversity ("Ill effects") ▸ adverb:  (`ill' is often used as a combining form) in a poor or improper or unsatisfactory manner; not well ("He was ill prepared") ▸ adverb:  with difficulty or inconvenience; scarcely or hardly ("We can ill afford to buy a new car just now") ▸ adverb:  unfavorably or with disapproval ("Tried not to speak ill of the dead") ▸ name:  A surname (very rare: popularity rank in the U.S.: #56571) ▸ Also see worst ▸ Word origin ▸ Words similar to ill ▸ Usage examples for ill ▸ Idioms related to ill (New!) ▸ Popular adjectives describing ill ▸ Popular nouns described by ill ▸ Words that often appear near ill ▸ Rhymes of ill ▸ Invented words related to ill