We found 23 dictionaries that define the word sets:

General (11 matching dictionaries)

1. sets: Longman Dictionary of Contemporary English
2. sets: Merriam-Webster
3. sets: Oxford Learner's Dictionaries
4. sets: Collins English Dictionary
5. Sets, sets: Vocabulary.com
6. Set's, Sets, set's, sets: Wordnik
7. sets: Cambridge Advanced Learner's Dictionary
8. sets: Wiktionary
9. SETS: Dictionary.com
10. sets: Cambridge Essential American English Dictionary
11. sets: TheFreeDictionary.com

Business (2 matching dictionaries)

12. sets: Legal dictionary
13. sets: Financial dictionary

Computing (2 matching dictionaries)

14. SETS: Free On-line Dictionary of Computing
15. SETS: Encyclopedia

Medicine (3 matching dictionaries)

16. sets: Merriam-Webster Medical Dictionary
17. online medical dictionary (No longer online)
18. sets: Medical dictionary

Miscellaneous (3 matching dictionaries)

19. SETS: Acronym Finder
20. AbbreviationZ (No longer online)
21. sets: Idioms

Slang (1 matching dictionary)

22. sets: Urban Dictionary

Sports (1 matching dictionary)

23. Sets: Sports Definitions

(Note: See set as well.)

Definitions from Wiktionary (sets) ▸ noun:  (informal) Set theory. Similar: arrange, put, pose, lay, lot, gear up, position, determine, fix, do, more... Opposite: breaks, dismantles, scatters, disperses, disassembles Types: finite set, infinite set, empty set, singleton set, subset, proper subset, power set, universal set, disjoint set, more... Phrases: sets out, data sets, sets up, sets in, sets forth, more... Adjectives: different, fuzzy, several, complete, large, sun, various, separate, distinct, multiple, following ▸ Words similar to sets ▸ Usage examples for sets ▸ Idioms related to sets ▸ Wikipedia articles (New!) ▸ Popular adjectives describing sets ▸ Words that often appear near sets ▸ Rhymes of sets ▸ Invented words related to sets