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We found 49 dictionaries with English definitions that include the word sir:
Click on the first link on a line below to go directly to a page where "sir" is defined.

General (32 matching dictionaries)

1. sir: Merriam-Webster.com [home, info]
2. Sir, Sir, sir: Oxford Learner's Dictionaries [home, info]
3. Sir, sir: American Heritage Dictionary of the English Language [home, info]
4. sir: Collins English Dictionary [home, info]
5. Sir, sir: Vocabulary.com [home, info]
6. sir: Macmillan Dictionary [home, info]
7. SIr, Sir, sir, sir, sir: Wordnik [home, info]
8. Sir, sir: Cambridge Advanced Learner's Dictionary [home, info]
9. SIR, Sir, sir: Wiktionary [home, info]
10. sir: Webster's New World College Dictionary, 4th Ed. [home, info]
11. sir: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. sir: Infoplease Dictionary [home, info]
13. SIR, Sir: Dictionary.com [home, info]
14. sir: Online Etymology Dictionary [home, info]
15. Sir, sir: UltraLingua English Dictionary [home, info]
16. sir: Cambridge Dictionary of American English [home, info]
17. SIR, Sir (album), Sir (disambiguation), Sir (film), Sir (singer), Sir: Wikipedia, the Free Encyclopedia [home, info]
18. Sir: Online Plain Text English Dictionary [home, info]
19. sir: Webster's Revised Unabridged, 1913 Edition [home, info]
20. sir: Rhymezone [home, info]
21. sir: AllWords.com Multi-Lingual Dictionary [home, info]
22. sir: Webster's 1828 Dictionary [home, info]
23. SIR: Stammtisch Beau Fleuve Acronyms [home, info]
24. Sir: Dictionary of Phrase and Fable (1898) [home, info]
25. Sir: 1911 edition of the Encyclopedia Britannica [home, info]
26. sir: Free Dictionary [home, info]
27. sir: Mnemonic Dictionary [home, info]
28. sir: WordNet 1.7 Vocabulary Helper [home, info]
29. Sir, sir: LookWAYup Translating Dictionary/Thesaurus [home, info]
30. Sir, sir: Dictionary/thesaurus [home, info]

Art (2 matching dictionaries)

31. SIR: Shakespeare Glossary [home, info]
32. sir-: A Cross Reference of Latin and Greek Elements [home, info]

Computing (4 matching dictionaries)

33. SIR: Free On-line Dictionary of Computing [home, info]
34. SIR: BABEL: Computer Oriented Abbreviations and Acronyms [home, info]
35. SIR: Computer Telephony & Electronics Dictionary and Glossary [home, info]
36. Sir: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

37. SIR, Sir: online medical dictionary [home, info]
38. sir: Medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

39. Sir: Arms and Armour [home, info]
40. SIR: Acronym Finder [home, info]
41. SIR: Three Letter Words with definitions [home, info]
42. SIR: AbbreviationZ [home, info]

Slang (1 matching dictionary)

43. s.i.r, sir: Urban Dictionary [home, info]

Sports (1 matching dictionary)

44. Sir: Dan's Poker [home, info]

Tech (3 matching dictionaries)

45. SIR: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING [home, info]
46. SIR: AUTOMOTIVE TERMS [home, info]
47. SIR: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]

(Note: See sirs for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (sir) ▸ noun:  term of address for a man ▸ noun:  a title used before the name of knight or baronet ▸ Also see sirs ▸ Word origin ▸ Words similar to sir ▸ Usage examples for sir ▸ Idioms related to sir (New!) ▸ Popular adjectives describing sir ▸ Words that often appear near sir ▸ Rhymes of sir ▸ Invented words related to sir