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We found 97 dictionaries with English definitions that include the word key:
Click on the first link on a line below to go directly to a page where "key" is defined.

General (37 matching dictionaries)

1. Key, key: Merriam-Webster.com [home, info]
2. key, key: Oxford Learner's Dictionaries [home, info]
3. key, key, key: American Heritage Dictionary of the English Language [home, info]
4. key: Collins English Dictionary [home, info]
5. Key, key: Vocabulary.com [home, info]
6. key, key, key: Macmillan Dictionary [home, info]
7. Key, key: Wordnik [home, info]
8. key: Cambridge Advanced Learner's Dictionary [home, info]
9. Key, Key, Key: InfoVisual Visual Dictionary [home, info]
10. Key, key: Wiktionary [home, info]
11. key: Webster's New World College Dictionary, 4th Ed. [home, info]
12. key: The Wordsmyth English Dictionary-Thesaurus [home, info]
13. key: Infoplease Dictionary [home, info]
14. key: Dictionary.com [home, info]
15. key (1), key (2): Online Etymology Dictionary [home, info]
16. Key, key: UltraLingua English Dictionary [home, info]
17. key: Cambridge Dictionary of American English [home, info]
18. key: Cambridge International Dictionary of Idioms [home, info]
19. KEY, KeY, Key (Meredith Monk album), Key (basketball), Key (character), Key (comics), Key (company), Key (computing), Key (cryptography), Key (database), Key (disambiguation), Key (engineering), Key (entertainer), Key (film), Key (instrument), Key (lock), Key (map), Key (music), Key (singer), Key (surname), Key (telugu film), Key, The Key (Elfgren and Strandberg novel), The Key (Joan Armatrading album), The Key (Matt Goss song), The Key (Nocturnus album), The Key (Speech Debelle song), The Key (Tanizaki novel), The Key (The Walking Dead), The Key (Vince Gill album), The Key (album), The Key (film), The Key (short story), The Key (smartcard), The Key: Wikipedia, the Free Encyclopedia [home, info]
20. key: Cambridge International Dictionary of Phrasal Verbs [home, info]
21. Key: Online Plain Text English Dictionary [home, info]
22. key: Webster's Revised Unabridged, 1913 Edition [home, info]
23. key: Rhymezone [home, info]
24. key: AllWords.com Multi-Lingual Dictionary [home, info]
25. key: Webster's 1828 Dictionary [home, info]
26. key: All About Homonyms [home, info]
27. Key: Dictionary of Phrase and Fable (1898) [home, info]
28. Key: 1911 edition of the Encyclopedia Britannica [home, info]
29. key: Free Dictionary [home, info]
30. key: Hutchinson Dictionaries [home, info]
31. key: Mnemonic Dictionary [home, info]
32. key: WordNet 1.7 Vocabulary Helper [home, info]
33. Key, key: LookWAYup Translating Dictionary/Thesaurus [home, info]
34. Key: Dictionary/thesaurus [home, info]
35. key: Wikimedia Commons US English Pronunciations [home, info]

Art (9 matching dictionaries)

36. key: ArtLex Lexicon of Visual Art Terminology [home, info]
37. Key: Art Glossary: Terminology for artists [home, info]
38. key: Essentials of Music [home, info]
39. Key: Virginia Tech Multimedia Music Dictionary [home, info]
40. Key: Movie Terminology Glossary [home, info]
41. key: Literary Criticism [home, info]
42. Key: Glossary of Stamp Collecting Terms [home, info]
43. Key: Dictionary of Symbolism [home, info]
44. KEY: Glossary of Art Terms [home, info]

Business (5 matching dictionaries)

45. key: Glossary of Legal Terms [home, info]
46. KEY: Bouvier's Law Dictionary 1856 Edition [home, info]
47. Key: Wideman Comparative Glossary of Project Management Terms [home, info]
48. key: Legal dictionary [home, info]
49. Key: Radio Programming and Production [home, info]

Computing (11 matching dictionaries)

50. key: Webster's New World Hacker Dictionary [home, info]
51. key: Free On-line Dictionary of Computing [home, info]
52. key: Netlingo [home, info]
53. key: CCI Computer [home, info]
54. key: Dictionary of Algorithms and Data Structures [home, info]
55. Key: Database Glossary [home, info]
56. key: Webopedia [home, info]
57. key: Hacking Lexicon [home, info]
58. key: I T Glossary [home, info]
59. Key: Technopedia [home, info]
60. Key (cryptography), key: Encyclopedia [home, info]

Medicine (1 matching dictionary)

61. key: online medical dictionary [home, info]

Miscellaneous (8 matching dictionaries)

62. KEY: Navajo Code Talkers' Dictionary [home, info]
63. Key: baby names list [home, info]
64. Key: Brilliant Dream Dictionary [home, info]
65. KEY: Acronym Finder [home, info]
66. KEY: Three Letter Words with definitions [home, info]
67. KEY: AbbreviationZ [home, info]
68. key: Idioms [home, info]
69. Key, Key, Key, Key, Key, Key, Key, Key: Dream Dictionary [home, info]

Religion (2 matching dictionaries)

70. Key: Easton Bible [home, info]
71. Key: Smith's Bible Dictionary [home, info]

Science (4 matching dictionaries)

72. key: Archaeology Wordsmith [home, info]
73. key: Botanical Terms [home, info]
74. key, key: PlanetMath Encyclopedia [home, info]
75. key: How Many? A Dictionary of Units of Measurement [home, info]

Slang (6 matching dictionaries)

76. Key: Totally Unofficial Rap [home, info]
77. key: American-Australian Slang Dictionary [home, info]
78. Key: Street Terms: Drugs and the Drug Trade [home, info]
79. key: The Folk File [home, info]
80. The Key: A Seattle Lexicon [home, info]
81. the key: Urban Dictionary [home, info]

Sports (4 matching dictionaries)

82. Key: Skydiving Glossary [home, info]
83. key: Hickok Sports Glossaries [home, info]
84. Key: Bicycle Glossary [home, info]
85. Key: Sports Definitions [home, info]

Tech (10 matching dictionaries)

86. key: Webster's New World Telecom Dictionary [home, info]
87. key: Book Binding [home, info]
88. Key: AUTOMOTIVE TERMS [home, info]
89. key: Locksmith Dictionary [home, info]
90. Key: Glossary of Fastener Terms [home, info]
91. Key (or luminance key): Glossary of video terms [home, info]
92. Key: Popular Cross Stitch Terms [home, info]
93. key: Rane Professional Audio Reference [home, info]
94. key: SeaTalk Dictionary of English Nautical Language [home, info]
95. Key: Sweetwater Music [home, info]

(Note: See keys for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (key) ▸ noun:  metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated ▸ noun:  a lever that actuates a mechanism when depressed ▸ noun:  pitch of the voice ("He spoke in a low key") ▸ noun:  something crucial for explaining ("The key to development is economic integration") ▸ noun:  a generic term for any device whose possession entitles the holder to a means of access ("A safe-deposit box usually requires two keys to open it") ▸ noun:  a list of words or phrases that explain symbols or abbreviations ▸ noun:  a list of answers to a test ("Some students had stolen the key to the final exam") ▸ noun:  any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music ▸ noun:  (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court ("He hit a jump shot from the top of the key") ▸ noun:  a coral reef off the southern coast of Florida ▸ noun:  United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843) ▸ noun:  a kilogram of a narcotic drug ("They were carrying two keys of heroin") ▸ noun:  the central building block at the top of an arch or vault ▸ noun:  mechanical device used to wind another device that is driven by a spring (as a clock) ▸ noun:  a winged often one-seed indehiscent fruit as of the ash or elm or maple ▸ verb:  provide with a key ("We were keyed after the locks were changed in the building") ▸ verb:  harmonize with or adjust to ("Key one's actions to the voters' prevailing attitude") ▸ verb:  regulate the musical pitch of ▸ verb:  vandalize a car by scratching the sides with a key ("His new Mercedes was keyed last night in the parking lot") ▸ verb:  identify as in botany or biology, for example ▸ adjective:  effective; producing a desired effect ▸ adjective:  serving as an essential component ▸ name:  A surname (rare: 1 in 6666 families; popularity rank in the U.S.: #796) ▸ Also see keys ▸ Word origin ▸ Words similar to key ▸ Usage examples for key ▸ Idioms related to key (New!) ▸ Popular adjectives describing key ▸ Popular nouns described by key ▸ Words that often appear near key ▸ Rhymes of key ▸ Invented words related to key