We found 60 dictionaries that define the word clock:

General (36 matching dictionaries)

1. clock, the clock: Merriam-Webster.com
2. clock, clock, the clock: Oxford Learner's Dictionaries
3. clock, clock: American Heritage Dictionary of the English Language
4. clock, the clock: Collins English Dictionary
5. Clock, clock, the-clock: Wordnik
6. clock, the clock: Cambridge Advanced Learner's Dictionary
7. Clock: InfoVisual Visual Dictionary
8. Clock, clock: Wiktionary
9. clock: Webster's New World College Dictionary, 4th Ed.
10. clock: The Wordsmyth English Dictionary-Thesaurus
11. clock: Infoplease Dictionary
12. clock: Dictionary.com
13. clock: Online Etymology Dictionary
14. clock: Cambridge Essential American English Dictionary
15. CLOCK, Clock (band), Clock (character), Clock (comics), Clock (cryptography), Clock (dance act), Clock (disambiguation), Clock (gene), Clock (model checking), Clock (restaurant), Clock (software), Clock, The Clock (TV series), The Clock (The Americans), The Clock (comics), The Clock (patience), The Clock (song): Wikipedia, the Free Encyclopedia
16. Clock: Online Plain Text English Dictionary
17. clock: Webster's Revised Unabridged, 1913 Edition
18. clock: Rhymezone
19. clock: AllWords.com Multi-Lingual Dictionary
20. clock: Webster's 1828 Dictionary
21. clock: Stammtisch Beau Fleuve Acronyms
22. Clock: Dictionary of Phrase and Fable (1898)
23. clock: Free Dictionary
24. clock: Mnemonic Dictionary
25. clock: LookWAYup Translating Dictionary/Thesaurus
26. clock: Dictionary/thesaurus
27. clock: Wikimedia Commons US English Pronunciations

Art (1 matching dictionary)

28. clock: ArtLex Lexicon of Visual Art Terminology

Business (1 matching dictionary)

29. Clock: Radio Programming and Production

Computing (5 matching dictionaries)

30. clock: Free On-line Dictionary of Computing
31. clock: CCI Computer
32. clock: Computer Telephony & Electronics Dictionary and Glossary
33. I T Glossary (No longer online)
34. Clock (gene), clock: Encyclopedia

Medicine (2 matching dictionaries)

35. online medical dictionary (No longer online)
36. Clock (gene), clock: Medical dictionary

Miscellaneous (3 matching dictionaries)

37. Brilliant Dream Dictionary (No longer online)
38. clock: Idioms
39. clock: Wordcraft Dictionary

Science (1 matching dictionary)

40. clock: Evolution Glossary

Slang (4 matching dictionaries)

41. clock, clock, clock, clock, clock, clock: Green’s Dictionary of Slang
42. clock: English slang and colloquialisms used in the United Kingdom
43. Totally Unofficial Rap (No longer online)
44. Clock: Dublin Slang and Phrasebook

Sports (3 matching dictionaries)

45. Clock: Backgammon
46. Clock: Chess Dictionary
47. Hickok Sports Glossaries (No longer online)

Tech (4 matching dictionaries)

48. clock: Electronics
49. AUTOMOTIVE TERMS (No longer online)
50. Rane Professional Audio Reference (No longer online)
51. Sweetwater Music (No longer online)

(Note: See clocked as well.)

Definitions from Wiktionary ( ) ▸ noun:  A chronometer, an instrument that measures time, particularly the time of day. ▸ noun:  (attributive) A common noun relating to an instrument that measures or keeps track of time. ▸ noun:  (British) The odometer of a motor vehicle. ▸ noun:  (electronics) An electrical signal that synchronizes timing among digital circuits of semiconductor chips or modules. ▸ noun:  The seed head of a dandelion. ▸ noun:  A time clock. ▸ noun:  (computing, informal) A CPU clock cycle, or T-state. ▸ noun:  (uncountable) A luck-based patience or solitaire card game with the cards laid out to represent the face of a clock. ▸ verb:  (transitive) To measure the duration of. ▸ verb:  (transitive) To measure the speed of. ▸ verb:  (transitive, slang) To hit (someone) heavily. ▸ verb:  (transitive, informal) To notice; to take notice of (someone or something). ▸ verb:  (transitive, informal, with as) To recognize; to assess. ▸ verb:  (transitive, informal) To identify (someone) as having some attribute (for example, being trans or gay). ▸ verb:  (British, slang) To falsify the reading of the odometer of a vehicle. ▸ verb:  (transitive, British, New Zealand, Australia, slang) To beat a video game. ▸ noun:  A pattern near the heel of a sock or stocking. ▸ verb:  (transitive) To ornament (e.g. the side of a stocking) with figured work. ▸ noun:  A large beetle, especially the European dung beetle (Geotrupes stercorarius). ▸ verb:  (Scotland, intransitive, dated) To make the sound of a hen; to cluck. ▸ verb:  (Scotland, intransitive, dated) To hatch. ▸ noun:  A surname. Similar: time, ticking, clockface, tocking, stopwatch, timekeeper, chronometer, timeclock, timer, longcase, more... Opposite: calendar, sundial, timer, stopwatch, hourglass Types: analog, digital, pendulum, grandfather, wall, alarm, atomic, chronometer, stopwatch, more... Phrases: the clock, clock on, clock in, alarm clock, time clock, more... Adjectives: old, biological, internal, digital, big, great, large, little, electric, circadian, tall ▸ Word origin ▸ Words similar to clock ▸ Usage examples for clock ▸ Idioms related to clock ▸ Civic discussion about clock (New!) ▸ Popular adjectives describing clock ▸ Words that often appear near clock ▸ Rhymes of clock ▸ Invented words related to clock