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We found 48 dictionaries with English definitions that include the word sis:
Click on the first link on a line below to go directly to a page where "sis" is defined.

General (30 matching dictionaries)

1. SIS, -sis, sis: Merriam-Webster.com [home, info]
2. SIS, SIS, sis, sis: Oxford Dictionaries [home, info]
3. sis: American Heritage Dictionary of the English Language [home, info]
4. sis: Collins English Dictionary [home, info]
5. sis: Vocabulary.com [home, info]
6. sis: Macmillan Dictionary [home, info]
7. SI's, SIs, Si's, Sis, sis: Wordnik [home, info]
8. sis: Cambridge Advanced Learner's Dictionary [home, info]
9. SIS, -sis, sis: Wiktionary [home, info]
10. sis: Webster's New World College Dictionary, 4th Ed. [home, info]
11. sis: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. sis: Infoplease Dictionary [home, info]
13. SIS, -sis: Dictionary.com [home, info]
14. -sis, sis: Online Etymology Dictionary [home, info]
15. sis: UltraLingua English Dictionary [home, info]
16. sis: Cambridge Dictionary of American English [home, info]
17. S.I.S, S.I.S (group), SIS (Sports Information Services), SIS (file format), SIS (motorbikes), SIS, SiS (TV series), SiS (talk show), Sis (ancient city), Sis, .sis: Wikipedia, the Free Encyclopedia [home, info]
18. Sis: Online Plain Text English Dictionary [home, info]
19. sis: Webster's Revised Unabridged, 1913 Edition [home, info]
20. sis: Rhymezone [home, info]
21. Sis: AllWords.com Multi-Lingual Dictionary [home, info]
22. SIS, sis: Stammtisch Beau Fleuve Acronyms [home, info]
23. Sis: 1911 edition of the Encyclopedia Britannica [home, info]
24. sis: Free Dictionary [home, info]
25. sis: Mnemonic Dictionary [home, info]
26. sis: WordNet 1.7 Vocabulary Helper [home, info]
27. sis: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. sis: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

29. -sis: A Cross Reference of Latin and Greek Elements [home, info]

Business (1 matching dictionary)

30. sis: Financial dictionary [home, info]

Computing (2 matching dictionaries)

31. SiS: Webopedia [home, info]
32. SIS: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

33. sis: online medical dictionary [home, info]
34. -sis: Neurotrauma Glossary [home, info]
35. -sis, sis: Medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

36. sis, sis, sis: Terminology and Descriptions of Geneaological Words [home, info]
37. SIS: Acronym Finder [home, info]
38. SIS: Three Letter Words with definitions [home, info]
39. SIS: AbbreviationZ [home, info]

Science (2 matching dictionaries)

40. SIS: Extragalactic Astronomy [home, info]
41. sis: Cytokines & Cells Online Pathfinder Encyclopaedia [home, info]

Slang (1 matching dictionary)

42. S.I.S, s.i.s, sis: Urban Dictionary [home, info]

Sports (1 matching dictionary)

43. S.I.S: Bicycle Glossary [home, info]

Tech (3 matching dictionaries)

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

(Note: See siss for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (sis) ▸ noun:  a female person who has the same parents as another person ("My sister married a musician") ▸ name:  A surname (very rare: popularity rank in the U.S.: #32832) ▸ Also see siss ▸ Word origin ▸ Words similar to sis ▸ Usage examples for sis ▸ Popular adjectives describing sis ▸ Words that often appear near sis ▸ Rhymes of sis ▸ Invented words related to sis