We found 21 dictionaries that define the word sirs:

General (11 matching dictionaries)

1. sirs: Merriam-Webster
2. sirs: Collins English Dictionary
3. Sirs, sirs: Vocabulary.com
4. Sir's, Sirs, sirs: Wordnik
5. sirs: Cambridge Advanced Learner's Dictionary
6. Sirs, sirs: Wiktionary
7. SIRS, Sirs: Dictionary.com
8. sirs: Cambridge Essential American English Dictionary
9. SIRS (disambiguation), SIRS, Sirs: Wikipedia, the Free Encyclopedia
10. SIRS: Dictionary of Americanisms (1848)
11. SIRS: TheFreeDictionary.com

Computing (1 matching dictionary)

12. SIRS: Encyclopedia

Medicine (3 matching dictionaries)

13. SIRS: Merriam-Webster Medical Dictionary
14. SIRS: Dictionary of Cancer Terms
15. SIRS: Medical dictionary

Miscellaneous (2 matching dictionaries)

16. SIRS: Acronym Finder
17. AbbreviationZ (No longer online)

Science (1 matching dictionary)

18. SIRS: Cytokines & Cells Online Pathfinder Encyclopaedia

Slang (1 matching dictionary)

19. SIRS: Urban Dictionary

Tech (2 matching dictionaries)

20. SIRS: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING
21. Glossary of Meteorology (No longer online)

(Note: See sir as well.)

Definitions from Wiktionary (SIRS) ▸ noun:  Abbreviation of systemic inflammatory response syndrome. Types: knights, baronets, more... Adjectives: dear, good, noble, young, fair, reverend, honourable, venerable, honoured, gentle, honorable ▸ Words similar to sirs ▸ Usage examples for sirs ▸ Idioms related to sirs ▸ Wikipedia articles (New!) ▸ Popular adjectives describing sirs ▸ Words that often appear near sirs ▸ Rhymes of sirs ▸ Invented words related to sirs