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We found 64 dictionaries with English definitions that include the word peak:
Click on the first link on a line below to go directly to a page where "peak" is defined.

General (32 matching dictionaries)

1. peak: Merriam-Webster.com [home, info]
2. peak, peak, peak: Oxford Dictionaries [home, info]
3. peak, peak: American Heritage Dictionary of the English Language [home, info]
4. peak: Collins English Dictionary [home, info]
5. peak: Vocabulary.com [home, info]
6. peak, peak, peak: Macmillan Dictionary [home, info]
7. Peak, peak: Wordnik [home, info]
8. peak: Cambridge Advanced Learner's Dictionary [home, info]
9. Peak: InfoVisual Visual Dictionary [home, info]
10. Peak, peak: Wiktionary [home, info]
11. peak: Webster's New World College Dictionary, 4th Ed. [home, info]
12. peak: The Wordsmyth English Dictionary-Thesaurus [home, info]
13. peak: Infoplease Dictionary [home, info]
14. peak: Dictionary.com [home, info]
15. peak: Online Etymology Dictionary [home, info]
16. Peak, peak: UltraLingua English Dictionary [home, info]
17. peak: Cambridge Dictionary of American English [home, info]
18. PEAK (automotive products), Peak (automotive products), Peak (company), Peak (constituency), Peak (geometry), Peak (novel), Peak (pharmacology), Peak, The Peak (Singapore Drama), The Peak (TV series), The Peak (newspaper), The peak: Wikipedia, the Free Encyclopedia [home, info]
19. Peak: Online Plain Text English Dictionary [home, info]
20. peak: Webster's Revised Unabridged, 1913 Edition [home, info]
21. peak: Rhymezone [home, info]
22. peak: AllWords.com Multi-Lingual Dictionary [home, info]
23. peak: Webster's 1828 Dictionary [home, info]
24. peak: All About Homonyms [home, info]
25. The Peak: 1911 edition of the Encyclopedia Britannica [home, info]
26. peak: Free Dictionary [home, info]
27. peak: Mnemonic Dictionary [home, info]
28. peak: WordNet 1.7 Vocabulary Helper [home, info]
29. Peak, peak: LookWAYup Translating Dictionary/Thesaurus [home, info]
30. peak: Dictionary/thesaurus [home, info]

Art (3 matching dictionaries)

31. Peak: Epicurus.com Wine Glossary [home, info]
32. peak: Literary Criticism [home, info]
33. Peak (P): Glossary of Stamp Collecting Terms [home, info]

Business (13 matching dictionaries)

34. Peak: MoneyGlossary.com [home, info]
35. peak: INVESTORWORDS [home, info]
36. PEAK: Accounting Glossary [home, info]
37. Peak: bizterms.net [home, info]
38. Peak: Bloomberg Financial Glossary [home, info]
39. Peak: Construction Term Glossary [home, info]
40. Peak: FACS Journalist's Guide to Economic Terms [home, info]
41. Peak: Deardorff's Glossary of International Economics [home, info]
42. Peak: Investopedia [home, info]
43. Peak (disambiguation), peak: Legal dictionary [home, info]
44. Peak (disambiguation), Peak: Financial dictionary [home, info]
45. Peak: Accounting, Business Studies and Economics Dictionary [home, info]
46. peak: BusinessDictionary.com [home, info]

Computing (1 matching dictionary)

47. Peak (disambiguation), peak: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

48. peak: Sound Alike Words [home, info]
49. peak: online medical dictionary [home, info]
50. Peak (disambiguation), peak: Medical dictionary [home, info]

Miscellaneous (3 matching dictionaries)

51. peak: Sound-Alike Words [home, info]
52. PEAK: Acronym Finder [home, info]
53. PEAK: AbbreviationZ [home, info]

Slang (1 matching dictionary)

54. peak, the peak: Urban Dictionary [home, info]

Sports (3 matching dictionaries)

55. Peak: Body Building [home, info]
56. peak: Glossary of Hiking Terms [home, info]
57. Peak: Sports Definitions [home, info]

Tech (5 matching dictionaries)

58. peak: Electronics [home, info]
59. peak: Schlumberger Oilfield Glossary [home, info]
60. peak: SeaTalk Dictionary of English Nautical Language [home, info]
61. Peak: Sweetwater Music [home, info]
62. Peak, Peak: Latitude Mexico [home, info]

(Note: See peaks for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (peak) ▸ noun:  the top point of a mountain or hill ("The view from the peak was magnificent") ▸ noun:  a brim that projects to the front to shade the eyes ▸ noun:  the highest point (of something) ("At the peak of the pyramid") ▸ noun:  the most extreme possible amount or value ("Voltage peak") ▸ noun:  a V shape ▸ noun:  the period of greatest prosperity or productivity ▸ noun:  the highest level or degree attainable ("The peak of perfection") ▸ verb:  to reach the highest point; attain maximum intensity, activity ("That wild, speculative spirit peaked in 1929") ▸ adjective:  of a period of maximal use or demand or activity ("At peak hours the streets traffic is unbelievable") ▸ name:  A surname (rare: 1 in 25000 families; popularity rank in the U.S.: #3004) ▸ Also see peaks ▸ Word origin ▸ Words similar to peak ▸ Usage examples for peak ▸ Popular adjectives describing peak ▸ Popular nouns described by peak ▸ Words that often appear near peak ▸ Rhymes of peak ▸ Invented words related to peak