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

General (36 matching dictionaries)

1. AT, At, at, at-: Merriam-Webster.com [home, info]
2. At, At, at, at, at-: Oxford Learner's Dictionaries [home, info]
3. AT, At, At, at, at, at-, aT: American Heritage Dictionary of the English Language [home, info]
4. at, at: Collins English Dictionary [home, info]
5. At, at: Vocabulary.com [home, info]
6. AT, at: Macmillan Dictionary [home, info]
7. A.T, AT, A't, At, At, At, a't, at, at, at, at, at, at, at, at, at, at, at, aT: Wordnik [home, info]
8. at: Cambridge Advanced Learner's Dictionary [home, info]
9. 'at, at, at-: Wiktionary [home, info]
10. at, at-: Webster's New World College Dictionary, 4th Ed. [home, info]
11. At, at, at-: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. at: Infoplease Dictionary [home, info]
13. .at, a.t, at, at-, aT: Dictionary.com [home, info]
14. at: Online Etymology Dictionary [home, info]
15. at: UltraLingua English Dictionary [home, info]
16. at: Cambridge Dictionary of American English [home, info]
17. at: Cambridge International Dictionary of Idioms [home, info]
18. .AT, AT (disambiguation), AT (form factor), AT, At (Unix), At (Windows), At (command), At, .at: Wikipedia, the Free Encyclopedia [home, info]
19. At: Online Plain Text English Dictionary [home, info]
20. at: Webster's Revised Unabridged, 1913 Edition [home, info]
21. at: Rhymezone [home, info]
22. at: AllWords.com Multi-Lingual Dictionary [home, info]
23. at: Webster's 1828 Dictionary [home, info]
24. at, at-: MyWord.info [home, info]
25. AT, At, .at, at: Stammtisch Beau Fleuve Acronyms [home, info]
26. At: Dictionary of Phrase and Fable (1898) [home, info]
27. AT: Turkish Acronyms to live by [home, info]
28. at: Free Dictionary [home, info]
29. at: Mnemonic Dictionary [home, info]
30. at: WordNet 1.7 Vocabulary Helper [home, info]
31. At, at: LookWAYup Translating Dictionary/Thesaurus [home, info]
32. AT, at, at-: Dictionary/thesaurus [home, info]
33. At: UVic Writer's Guide [home, info]
34. at: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

35. AT: Glossary of Stamp Collecting Terms [home, info]

Business (5 matching dictionaries)

36. AT: MoneyGlossary.com [home, info]
37. at: Webster's New World Finance & Investment Dictionary [home, info]
38. AT: Travel Industry Dictionary [home, info]
39. AT: Bloomberg Financial Glossary [home, info]
40. AT: Financial dictionary [home, info]

Computing (6 matching dictionaries)

41. AT, at: Free On-line Dictionary of Computing [home, info]
42. AT: CCI Computer [home, info]
43. AT, At: BABEL: Computer Oriented Abbreviations and Acronyms [home, info]
44. AT: Computer Telephony & Electronics Dictionary and Glossary [home, info]
45. AT: Webopedia [home, info]
46. AT (form factor), At (symbol), at: Encyclopedia [home, info]

Medicine (5 matching dictionaries)

47. AT (in DNA): MedTerms.com Medical Dictionary [home, info]
48. At, at, at-: online medical dictionary [home, info]
49. AT: Hepatitis C Information Central [home, info]
50. At, at, at-: Medical dictionary [home, info]
51. AT (in DNA): Drug Medical Dictionary [home, info]

Miscellaneous (3 matching dictionaries)

52. AT: Navajo Code Talkers' Dictionary [home, info]
53. AT: Acronym Finder [home, info]
54. AT: AbbreviationZ [home, info]

Science (3 matching dictionaries)

55. At, at: A Dictionary of Quaternary Acronyms and Abbreviations [home, info]
56. At: WebElements Periodic Table of the Elements [home, info]
57. at: How Many? A Dictionary of Units of Measurement [home, info]

Slang (1 matching dictionary)

58. AT: Urban Dictionary [home, info]

Sports (1 matching dictionary)

59. A.T: Glossary of Hiking Terms [home, info]

Tech (3 matching dictionaries)

60. AT: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING [home, info]
61. AT, At: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]
62. AT: Explosives [home, info]

(Note: See ating for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (at) ▸ noun:  100 at equal 1 kip ▸ noun:  a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium ▸ Also see ating ▸ Word origin ▸ Words similar to at ▸ Usage examples for at ▸ Idioms related to at (New!) ▸ Popular adjectives describing at ▸ Words that often appear near at ▸ Rhymes of at ▸ Invented words related to at