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We found 58 dictionaries with English definitions that include the word fast:
Click on the first link on a line below to go directly to a page where "fast" is defined.

General (31 matching dictionaries)

1. fast: Merriam-Webster.com [home, info]
2. fast, fast: Oxford Learner's Dictionaries [home, info]
3. fast, fast: American Heritage Dictionary of the English Language [home, info]
4. fast: Collins English Dictionary [home, info]
5. fast: Vocabulary.com [home, info]
6. fast, fast, fast, fast: Macmillan Dictionary [home, info]
7. Fast, fast: Wordnik [home, info]
8. fast: Cambridge Advanced Learner's Dictionary [home, info]
9. FAST, Fast, fast: Wiktionary [home, info]
10. fast: Webster's New World College Dictionary, 4th Ed. [home, info]
11. fast: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. fast: Infoplease Dictionary [home, info]
13. FAST: Dictionary.com [home, info]
14. fast (adj.), fast (v.): Online Etymology Dictionary [home, info]
15. fast: UltraLingua English Dictionary [home, info]
16. fast: Cambridge Dictionary of American English [home, info]
17. fast: Cambridge International Dictionary of Idioms [home, info]
18. FAST (stroke), FAST (telescope), FAST, Fast (song), Fast, The Fast (band), The Fast: Wikipedia, the Free Encyclopedia [home, info]
19. Fast: Online Plain Text English Dictionary [home, info]
20. fast: Webster's Revised Unabridged, 1913 Edition [home, info]
21. fast: Rhymezone [home, info]
22. fast, fast: AllWords.com Multi-Lingual Dictionary [home, info]
23. fast: Webster's 1828 Dictionary [home, info]
24. FAST: Stammtisch Beau Fleuve Acronyms [home, info]
25. fast: Free Dictionary [home, info]
26. fast: Mnemonic Dictionary [home, info]
27. fast: WordNet 1.7 Vocabulary Helper [home, info]
28. Fast, fast: LookWAYup Translating Dictionary/Thesaurus [home, info]
29. fast: Dictionary/thesaurus [home, info]

Art (2 matching dictionaries)

30. FAST: Shakespeare Glossary [home, info]
31. Fast: Natural Magick [home, info]

Business (2 matching dictionaries)

32. FAST: Numa DERIVATIVES ACRONYMS [home, info]
33. Fast (disambiguation), fast: Legal dictionary [home, info]

Computing (3 matching dictionaries)

34. FAST: Free On-line Dictionary of Computing [home, info]
35. FAST: CCI Computer [home, info]
36. Fast (disambiguation), fast: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

37. FAST, fast: online medical dictionary [home, info]
38. Fast (disambiguation), fast: Medical dictionary [home, info]
39. fast: Hyperdictionary [home, info]

Miscellaneous (3 matching dictionaries)

40. FAST: Acronym Finder [home, info]
41. FAST: AbbreviationZ [home, info]
42. fast: Idioms [home, info]

Religion (1 matching dictionary)

43. Fast: Easton Bible [home, info]

Science (1 matching dictionary)

44. fast: LITTLE EXPLORERS(TM) Picture Dictionary [home, info]

Slang (1 matching dictionary)

45. Fast: Street Terms: Drugs and the Drug Trade [home, info]

Sports (4 matching dictionaries)

46. Fast: Dan's Poker [home, info]
47. Fast: Gambling Glossary [home, info]
48. Fast: Texas Hold'em Dictionary [home, info]
49. Fast: Sports Definitions [home, info]

Tech (7 matching dictionaries)

50. fast: Webster's New World Telecom Dictionary [home, info]
51. FAST: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING [home, info]
52. Fast: AUTOMOTIVE TERMS [home, info]
53. FAST: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]
54. Fast: Construction deterioration & building durability glossary [home, info]
55. fast: SeaTalk Dictionary of English Nautical Language [home, info]
56. Fast, Fast: Latitude Mexico [home, info]

(Note: See fasts for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (fast) ▸ noun:  abstaining from food ▸ verb:  abstain from eating ("Before the medical exam, you must fast") ▸ verb:  abstain from certain foods, as for religious or medical reasons ("Catholics sometimes fast during Lent") ▸ adjective:  resistant to destruction or fading ("Fast colors") ▸ adjective:  (of surfaces) conducive to rapid speeds ("A fast road") ▸ adjective:  acting or moving or capable of acting or moving quickly ("Fast film") ▸ adjective:  at a rapid tempo ("The band played a fast fox trot") ▸ adjective:  (used of timepieces) indicating a time ahead of or later than the correct time ("My watch is fast") ▸ adjective:  securely fixed in place ▸ adjective:  hurried and brief ("A fast visit") ▸ adjective:  firmly fastened or secured against opening ("Windows and doors were all fast") ▸ adjective:  unrestrained by convention or morality ("Fast women") ▸ adverb:  quickly or rapidly (often used as a combining form) ("How fast can he get here?") ▸ adverb:  firmly or tightly ("Held fast to the rope") ▸ name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6550) ▸ Also see fasts ▸ Word origin ▸ Words similar to fast ▸ Usage examples for fast ▸ Idioms related to fast (New!) ▸ Popular adjectives describing fast ▸ Popular nouns described by fast ▸ Words that often appear near fast ▸ Rhymes of fast ▸ Invented words related to fast