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We found 55 dictionaries with English definitions that include the word add:
Click on the first link on a line below to go directly to a page where "add" is defined.

General (34 matching dictionaries)

1. ADD, add: Merriam-Webster.com [home, info]
2. ADD, ADD, add: Oxford Learner's Dictionaries [home, info]
3. ADD, add: American Heritage Dictionary of the English Language [home, info]
4. add: Collins English Dictionary [home, info]
5. ADD, add: Vocabulary.com [home, info]
6. ADD, add: Macmillan Dictionary [home, info]
7. Add, add: Wordnik [home, info]
8. ADD, add: Cambridge Advanced Learner's Dictionary [home, info]
9. ADD, add: Wiktionary [home, info]
10. add: Webster's New World College Dictionary, 4th Ed. [home, info]
11. add: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. add: Infoplease Dictionary [home, info]
13. ADD, add: Dictionary.com [home, info]
14. add: Online Etymology Dictionary [home, info]
15. add: UltraLingua English Dictionary [home, info]
16. add: Cambridge Dictionary of American English [home, info]
17. add: Cambridge International Dictionary of Idioms [home, info]
18. A.D.D, A.D.D. (Audio Day Dream), ADD (disambiguation), ADD, Add: Wikipedia, the Free Encyclopedia [home, info]
19. add: Cambridge International Dictionary of Phrasal Verbs [home, info]
20. Add: Online Plain Text English Dictionary [home, info]
21. add: Webster's Revised Unabridged, 1913 Edition [home, info]
22. Add: Rhymezone [home, info]
23. add: AllWords.com Multi-Lingual Dictionary [home, info]
24. add: Webster's 1828 Dictionary [home, info]
25. AD'D', ADD, ADD: Stammtisch Beau Fleuve Acronyms [home, info]
26. add: All About Homonyms [home, info]
27. add: Free Dictionary [home, info]
28. add: Mnemonic Dictionary [home, info]
29. add: WordNet 1.7 Vocabulary Helper [home, info]
30. add: LookWAYup Translating Dictionary/Thesaurus [home, info]
31. ADD: Dictionary/thesaurus [home, info]
32. add: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

33. add: Epicurus.com Spanish Glossary [home, info]

Business (2 matching dictionaries)

34. ADD: Deardorff's Glossary of International Economics [home, info]
35. add: Legal dictionary [home, info]

Computing (2 matching dictionaries)

36. ADD: BABEL: Computer Oriented Abbreviations and Acronyms [home, info]
37. add: Encyclopedia [home, info]

Medicine (8 matching dictionaries)

38. ADD (attention deficit disorder): MedTerms.com Medical Dictionary [home, info]
39. ADD: Reactive Attachment Disorder [home, info]
40. ADD: Natural Health glossary [home, info]
41. ADD: A-Z Family health glossary [home, info]
42. ADD: Sleep Terms [home, info]
43. ADD, add: Medical dictionary [home, info]
44. ADD: University of Maryland Glossary of Medical Terms [home, info]
45. ADD (attention deficit disorder): Drug Medical Dictionary [home, info]

Miscellaneous (5 matching dictionaries)

46. add: Sound-Alike Words [home, info]
47. ADD: Acronym Finder [home, info]
48. ADD: Three Letter Words with definitions [home, info]
49. ADD: AbbreviationZ [home, info]
50. add: Idioms [home, info]

Science (1 matching dictionary)

51. add: MATH SPOKEN HERE! [home, info]

Slang (1 matching dictionary)

52. A.D.D, A.D.D, The Add, add: Urban Dictionary [home, info]

Tech (1 matching dictionary)

53. ADD: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]

(Note: See adds for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (Add) ▸ noun:  a condition (mostly in boys) characterized by behavioral and learning disorders ▸ verb:  constitute an addition ("This paper will add to her reputation") ▸ verb:  make an addition by combining numbers ("Add 27 and 49, please!") ▸ verb:  state or say further ▸ verb:  make an addition (to); join or combine or unite with others; increase the quality, quantity, zise or scope of ("We added two students to that dorm room") ▸ verb:  bestow a quality on ("The music added a lot to the play") ▸ verb:  determine the sum of ("Add all the people in this town to those of the neighboring town") ▸ Also see adds ▸ Word origin ▸ Words similar to add ▸ Usage examples for add ▸ Idioms related to add (New!) ▸ Popular adjectives describing add ▸ Words that often appear near add ▸ Rhymes of add ▸ Invented words related to add