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We found 73 dictionaries with English definitions that include the word act:
Click on the first link on a line below to go directly to a page where "act" is defined.

General (34 matching dictionaries)

1. ACT, act: Merriam-Webster.com [home, info]
2. ACT, act: Oxford Learner's Dictionaries [home, info]
3. ACT, ACT, act: American Heritage Dictionary of the English Language [home, info]
4. act: Collins English Dictionary [home, info]
5. act: Vocabulary.com [home, info]
6. ACT, act, act, the ACT: Macmillan Dictionary [home, info]
7. Act, act: Wordnik [home, info]
8. act: Cambridge Advanced Learner's Dictionary [home, info]
9. A.C.T, ACT, Act, act: Wiktionary [home, info]
10. act: Webster's New World College Dictionary, 4th Ed. [home, info]
11. act: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. act: Infoplease Dictionary [home, info]
13. A.C.T, ACT, act: Dictionary.com [home, info]
14. act (n.): Online Etymology Dictionary [home, info]
15. Act, act: UltraLingua English Dictionary [home, info]
16. act: Cambridge Dictionary of American English [home, info]
17. act: Cambridge International Dictionary of Idioms [home, info]
18. A.C.T, ACT (NASDAQ), ACT (audio format), ACT (examination), ACT (nonprofit organization), ACT (test), ACT, ACT, Act (band), Act (document), Act (drama), Act (law), Act (theater), Act, The Act (TV series), The Act (album), The Act (band), The Act (musical), The Act (video game), The Act: Wikipedia, the Free Encyclopedia [home, info]
19. act: Cambridge International Dictionary of Phrasal Verbs [home, info]
20. Act: Online Plain Text English Dictionary [home, info]
21. act: Webster's Revised Unabridged, 1913 Edition [home, info]
22. act: Rhymezone [home, info]
23. act: AllWords.com Multi-Lingual Dictionary [home, info]
24. act: Webster's 1828 Dictionary [home, info]
25. ACT: Stammtisch Beau Fleuve Acronyms [home, info]
26. Act: 1911 edition of the Encyclopedia Britannica [home, info]
27. act: Free Dictionary [home, info]
28. act: Mnemonic Dictionary [home, info]
29. act: WordNet 1.7 Vocabulary Helper [home, info]
30. act: LookWAYup Translating Dictionary/Thesaurus [home, info]
31. ACT: Dictionary/thesaurus [home, info]
32. act: Wikimedia Commons US English Pronunciations [home, info]

Art (6 matching dictionaries)

33. ACT: Technical Glossary of Theatre Terms [home, info]
34. act: The Organon: A Conceptually Indexed Dictionary (by Genus and Differentia) [home, info]
35. act: Literary Criticism [home, info]
36. act-, act-: A Cross Reference of Latin and Greek Elements [home, info]
37. ACT: Glossary of Stamp Collecting Terms [home, info]
38. act: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (17 matching dictionaries)

39. act: Webster's New World Law Dictionary [home, info]
40. Act: Duhaime's Canadian law dictionary [home, info]
41. act: Law.com Dictionary [home, info]
42. act: Everybody's Legal Dictionary [home, info]
43. Act: THE 'LECTRIC LAW LIBRARY'S REFERENCE ROOM [home, info]
44. act: Glossary of Legal Terms [home, info]
45. ACT: bizterms.net [home, info]
46. ACT: C-SPAN Congressional Glossary [home, info]
47. ACT: Glossary of Crop Abbreviations [home, info]
48. Act: GLOSSARY OF LEGISLATIVE TERMS [home, info]
49. The Act: Glossary of Consumer Proposals Terms [home, info]
50. ACT: Bouvier's Law Dictionary 1856 Edition [home, info]
51. ACT: Investopedia [home, info]
52. Act: International Law Dictionary [home, info]
53. Act: INSOLVENCY [home, info]
54. Act (disambiguation), Act (legislature), act: Legal dictionary [home, info]
55. act: BusinessDictionary.com [home, info]

Computing (2 matching dictionaries)

56. ACT: Free On-line Dictionary of Computing [home, info]
57. ACT, Act (disambiguation), Act (legislature), Act, act: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

58. ACT, act: online medical dictionary [home, info]
59. ACT, Act (disambiguation), Act (legislature), act-: Medical dictionary [home, info]
60. ACT: PERFUSION TECHNOLOGY, OPEN HEART SURGERY AND CARDIOLOGY [home, info]

Miscellaneous (4 matching dictionaries)

61. ACT: Acronym Finder [home, info]
62. ACT: Three Letter Words with definitions [home, info]
63. ACT: AbbreviationZ [home, info]
64. act: Idioms [home, info]

Science (1 matching dictionary)

65. ACT: A Dictionary of Quaternary Acronyms and Abbreviations [home, info]

Slang (1 matching dictionary)

66. A.C.T, ACT: Urban Dictionary [home, info]

Sports (1 matching dictionary)

67. Act: Dan's Poker [home, info]

Tech (4 matching dictionaries)

68. act: NATURAL RESOURCES DEFENSE COUNCIL [home, info]
69. ACT: AUTOMOTIVE TERMS [home, info]
70. ACT: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]
71. act (segment): Television: Critical Methods and Applications [home, info]

(Note: See acts for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (act) ▸ noun:  something that people do or cause to happen ▸ noun:  a legal document codifying the result of deliberations of a committee or society or legislative body ▸ noun:  a short theatrical performance that is part of a longer program ("He did his act three times every evening") ▸ noun:  a subdivision of a play or opera or ballet ▸ noun:  a manifestation of insincerity ("He put on quite an act for her benefit") ▸ verb:  perform an action, or work out or perform (an action) ("Think before you act") ▸ verb:  be engaged in an activity, often for no particular purpose other than pleasure ▸ verb:  be suitable for theatrical performance ("This scene acts well") ▸ verb:  discharge one's duties ("She acts as the chair") ▸ verb:  behave in a certain manner; show a certain behavior; conduct or comport oneself ("You should act like an adult") ▸ verb:  play a role or part ("She wants to act Lady Macbeth, but she is too young for the role") ▸ verb:  perform on a stage or theater ("She acts in this play") ▸ verb:  pretend to have certain qualities or state of mind ("He acted the idiot") ▸ verb:  have an effect or outcome; often the one desired or expected ("How does your idea work in practice?") ▸ verb:  behave unnaturally or affectedly ("She's just acting") ▸ Also see acts ▸ Word origin ▸ Words similar to act ▸ Usage examples for act ▸ Idioms related to act (New!) ▸ Popular adjectives describing act ▸ Words that often appear near act ▸ Rhymes of act ▸ Invented words related to act