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We found 68 dictionaries with English definitions that include the word lock:
Click on the first link on a line below to go directly to a page where "lock" is defined.

General (34 matching dictionaries)

1. lock: Merriam-Webster.com [home, info]
2. lock, lock: Oxford Dictionaries [home, info]
3. lock, lock: American Heritage Dictionary of the English Language [home, info]
4. lock: Collins English Dictionary [home, info]
5. lock: Vocabulary.com [home, info]
6. lock, lock: Macmillan Dictionary [home, info]
7. Lock, lock: Wordnik [home, info]
8. lock: Cambridge Advanced Learner's Dictionary [home, info]
9. Lock: Wiktionary [home, info]
10. lock: Webster's New World College Dictionary, 4th Ed. [home, info]
11. lock: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. lock: Infoplease Dictionary [home, info]
13. Lock, lock: Dictionary.com [home, info]
14. lock (1), lock (2): Online Etymology Dictionary [home, info]
15. Lock, lock: UltraLingua English Dictionary [home, info]
16. lock: Cambridge Dictionary of American English [home, info]
17. lock, lock: Cambridge International Dictionary of Idioms [home, info]
18. Lock (Rugby Union), Lock (Saga of the Skolian Empire), Lock (Waltz), Lock (computer science), Lock (database), Lock (device), Lock (disambiguation), Lock (film), Lock (firearm), Lock (rugby league), Lock (rugby union), Lock (security device), Lock (software engineering), Lock (surname), Lock (water navigation), Lock (water transport), Lock (waterwat transport), Lock (waterway), Lock (weapons guidance), Lock, The Lock (Constable), The Lock (Fragonard), -lock: Wikipedia, the Free Encyclopedia [home, info]
19. lock: Cambridge International Dictionary of Phrasal Verbs [home, info]
20. Lock: Online Plain Text English Dictionary [home, info]
21. lock: Webster's Revised Unabridged, 1913 Edition [home, info]
22. lock: Rhymezone [home, info]
23. lock: AllWords.com Multi-Lingual Dictionary [home, info]
24. lock: Webster's 1828 Dictionary [home, info]
25. lock: All About Homonyms [home, info]
26. Lock: 1911 edition of the Encyclopedia Britannica [home, info]
27. lock: Free Dictionary [home, info]
28. lock: Mnemonic Dictionary [home, info]
29. lock: WordNet 1.7 Vocabulary Helper [home, info]
30. Lock, lock: LookWAYup Translating Dictionary/Thesaurus [home, info]
31. lock: Dictionary/thesaurus [home, info]
32. lock: Wikimedia Commons US English Pronunciations [home, info]

Business (5 matching dictionaries)

33. Lock: MoneyGlossary.com [home, info]
34. Lock: Bloomberg Financial Glossary [home, info]
35. Lock: eyefortransport e-commerce transportation glossary [home, info]
36. lock: Legal dictionary [home, info]
37. Lock: Financial dictionary [home, info]

Computing (6 matching dictionaries)

38. lock: Computer Telephony & Electronics Dictionary and Glossary [home, info]
39. Lock: Database Glossary [home, info]
40. lock: Webopedia [home, info]
41. lock: I T Glossary [home, info]
42. Lock: Technopedia [home, info]
43. Lock (device), lock: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

44. lock: online medical dictionary [home, info]
45. lock: Medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

46. Lock: Brilliant Dream Dictionary [home, info]
47. LOCK: Acronym Finder [home, info]
48. LOCK: AbbreviationZ [home, info]
49. lock: Idioms [home, info]

Religion (3 matching dictionaries)

50. Lock: Easton Bible [home, info]
51. Lock: Smith's Bible Dictionary [home, info]
52. lock: Scientology® and Dianetics® [home, info]

Science (3 matching dictionaries)

53. lock: LITTLE EXPLORERS(TM) Picture Dictionary [home, info]
54. lock: Archaeology Wordsmith [home, info]
55. lock: MATH SPOKEN HERE! [home, info]

Slang (2 matching dictionaries)

56. Lock: Totally Unofficial Rap [home, info]
57. lock: The Folk File [home, info]

Sports (4 matching dictionaries)

58. Lock: Dan's Poker [home, info]
59. Lock: Gambling Glossary [home, info]
60. lock: Hickok Sports Glossaries [home, info]
61. Lock: Texas Hold'em Dictionary [home, info]

Tech (5 matching dictionaries)

62. Lock: AUTOMOTIVE TERMS [home, info]
63. lock: Locksmith Dictionary [home, info]
64. LOCK: Lake and Water Word Glossary [home, info]
65. lock: Schlumberger Oilfield Glossary [home, info]
66. lock: SeaTalk Dictionary of English Nautical Language [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (lock) ▸ noun:  any wrestling hold in which some part of the opponent's body is twisted or pressured ▸ noun:  a fastener fitted to a door or drawer to keep it firmly closed ▸ noun:  a restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key ▸ noun:  enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it ▸ noun:  a mechanism that detonates the charge of a gun ▸ noun:  a strand or cluster of hair ▸ verb:  pass by means through a lock in a waterway ▸ verb:  become rigid or immoveable ("The therapist noticed that the patient's knees tended to lock in this exercise") ▸ verb:  fasten with a lock ("Lock the bike to the fence") ▸ verb:  hold in a locking position ("He locked his hands around her neck") ▸ verb:  build locks in order to facilitate the navigation of vessels ▸ verb:  hold fast (in a certain state) ("He was locked in a laughing fit") ▸ verb:  become engaged or intermeshed with one another ("They were locked in embrace") ▸ verb:  place in a place where something cannot be removed or someone cannot escape ("The parents locked her daughter up for the weekend") ▸ verb:  keep engaged ▸ name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #4930) ▸ Word origin ▸ Words similar to lock ▸ Usage examples for lock ▸ Popular adjectives describing lock ▸ Words that often appear near lock ▸ Rhymes of lock ▸ Invented words related to lock