We found 20 dictionaries that define the word zero sum:

General (14 matching dictionaries)

1. zero-sum: Merriam-Webster
2. zero-sum: Oxford Learner's Dictionaries
3. zero-sum: American Heritage Dictionary of the English Language
4. zero-sum, zero-sum: Collins English Dictionary
5. Zero-Sum, zero-sum: Wordnik
6. zero-sum: Cambridge Advanced Learner's Dictionary
7. zero-sum: Wiktionary
8. zero-sum: Infoplease Dictionary
9. zero-sum, zero sum: Dictionary.com
10. zero-sum: Cambridge Essential American English Dictionary
11. Zero Sum (The X-Files), Zero-sum, Zero-sum (Game theory), Zero-sum (game theory), Zero sum (disambiguation), Zero sum: Wikipedia, the Free Encyclopedia
12. zero-sum: TheFreeDictionary.com
13. zero-sum: Webster's New World College Dictionary, 4th Ed.
14. zero-sum: The Wordsmyth English Dictionary-Thesaurus

Business (3 matching dictionaries)

15. MoneyGlossary.com (No longer online)
16. Zero Sum, zero-sum: Financial dictionary
17. Yahoo Tax Center Glossary (No longer online)

Computing (1 matching dictionary)

18. zero-sum: Encyclopedia

Miscellaneous (1 matching dictionary)

19. Political (No longer online)

Slang (1 matching dictionary)

20. Zero-Sum: Urban Dictionary

Definitions from Wikipedia (Zero sum) ▸ noun:  a situation in which a participant's gain or loss is exactly balanced by the losses or gains of the other participants. Types: positive sum, negative sum, more... Phrases: zero sum game, two person zero sum game, Monthly Comic Zero Sum, more... ▸ Words similar to zero sum ▸ Usage examples for zero sum ▸ Idioms related to zero sum ▸ Wikipedia articles (New!) ▸ Words that often appear near zero sum ▸ Rhymes of zero sum ▸ Invented words related to zero sum