We found 30 dictionaries that define the word yo yo:

General (23 matching dictionaries)

1. yo yo: Longman Dictionary of Contemporary English
2. yo-yo: Merriam-Webster
3. yo-yo: Oxford Learner's Dictionaries
4. yo-yo: American Heritage Dictionary of the English Language
5. yo-yo, yo-yo: Collins English Dictionary
6. yo-yo: Vocabulary.com
7. YO-YO, Yo-Yo, Yo-yo, yo-yo: Wordnik
8. yo-yo: Cambridge Advanced Learner's Dictionary
9. yo-yo: Wiktionary
10. yo-yo: Webster's New World College Dictionary, 4th Ed.
11. yo-yo: The Wordsmyth English Dictionary-Thesaurus
12. yo-yo: Infoplease Dictionary
13. yo-yo, yo yo: Dictionary.com
14. yo-yo: Online Etymology Dictionary
15. yo-yo: Cambridge Essential American English Dictionary
16. Yo-Yo, Yo-Yo (Billy Joe Royal song), Yo-Yo (The Osmonds song), Yo-Yo (album), Yo-Yo (rapper), Yo Yo, Yo-yo, Yo-yo (algorithm), Yo-yo (disambiguation), Yo yo: Wikipedia, the Free Encyclopedia
17. yo-yo: Rhymezone
18. yo-yo: FreeDictionary.org
19. yo-yo: Mnemonic Dictionary
20. yo-yo: TheFreeDictionary.com
21. yo-yo: Wikimedia Commons US English Pronunciations

Art (1 matching dictionary)

22. Technical Glossary of Theatre Terms (No longer online)

Business (1 matching dictionary)

23. Yo-Yo: Investopedia

Computing (2 matching dictionaries)

24. yo-yo: CCI Computer
25. Yo yo, yo-yo: Encyclopedia

Miscellaneous (1 matching dictionary)

26. yo-yo: A Word A Day

Slang (2 matching dictionaries)

27. Yo Yo (offensive): Racial Slur Database
28. yo-yo, yo yo, yo yo: Urban Dictionary

Definitions from Wikipedia (Yo Yo) ▸ noun:  Yoyo, also referred to as Yo Yo, is a 1965 French comedy film directed by and starring Pierre Étaix. Phrases: yo yo dieting, yo yo ma, ma yo yo, yo yo stock, Yo Yo Honey Singh, more... ▸ Word origin ▸ Words similar to yo yo ▸ Usage examples for yo yo ▸ Idioms related to yo yo ▸ Wikipedia articles (New!) ▸ Words that often appear near yo yo ▸ Rhymes of yo yo ▸ Invented words related to yo yo