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We found 61 dictionaries with English definitions that include the word sub:
Click on the first link on a line below to go directly to a page where "sub" is defined.

General (33 matching dictionaries)

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

Art (3 matching dictionaries)

32. sub: Anime Glossary [home, info]
33. sub-: A Cross Reference of Latin and Greek Elements [home, info]
34. SUB: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (1 matching dictionary)

35. sub-: Glossary of Legal Terms [home, info]

Computing (3 matching dictionaries)

36. SUB: Free On-line Dictionary of Computing [home, info]
37. SUB: BABEL: Computer Oriented Abbreviations and Acronyms [home, info]
38. sub: Encyclopedia [home, info]

Medicine (8 matching dictionaries)

39. Sub-: MedTerms.com Medical Dictionary [home, info]
40. sub: ABTA Brain Tumor Patients [home, info]
41. Sub-: MedFriendly Glossary [home, info]
42. SUB, sub-: online medical dictionary [home, info]
43. sub-: Neurotrauma Glossary [home, info]
44. sub-: Glossary of HIV/AIDS Related Terms [home, info]
45. sub, sub-: Medical dictionary [home, info]
46. Sub-: Drug Medical Dictionary [home, info]

Miscellaneous (4 matching dictionaries)

47. SUB-, SuB: Acronym Finder [home, info]
48. SUB: Three Letter Words with definitions [home, info]
49. SUB: AbbreviationZ [home, info]
50. sub: Idioms [home, info]

Science (4 matching dictionaries)

51. sub: Dictionary of Botanical Epithets [home, info]
52. sub-: Botanical Terms [home, info]
53. sub-: Flora of New South Wales [home, info]
54. sub-: Glossary of Roots of Botanical Names [home, info]

Slang (1 matching dictionary)

55. S.U.B, The Sub: Urban Dictionary [home, info]

Tech (4 matching dictionaries)

56. sub: Webster's New World Telecom Dictionary [home, info]
57. sub: Schlumberger Oilfield Glossary [home, info]
58. sub: SeaTalk Dictionary of English Nautical Language [home, info]
59. Sub: Sweetwater Music [home, info]

(Note: See subs for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (Sub) ▸ noun:  a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States ▸ noun:  a submersible warship usually armed with torpedoes ▸ verb:  be a substitute ("The young teacher had to substitute for the sick colleague") ▸ name:  A surname (very rare: popularity rank in the U.S.: #67417) ▸ Also see subs ▸ Word origin ▸ Words similar to sub ▸ Usage examples for sub ▸ Idioms related to sub (New!) ▸ Popular adjectives describing sub ▸ Words that often appear near sub ▸ Rhymes of sub ▸ Invented words related to sub