We found 15 dictionaries that define the word uu:

General (8 matching dictionaries)

1. UU: Collins English Dictionary
2. UU, Uu, uu, uU: Wordnik
3. UU, uu: Wiktionary
4. UU: Webster's New World College Dictionary, 4th Ed.
5. UU: Dictionary.com
6. UU, Uu: Wikipedia, the Free Encyclopedia
7. UU: Stammtisch Beau Fleuve Acronyms
8. UU: TheFreeDictionary.com

Business (2 matching dictionaries)

9. Travel Industry Dictionary (No longer online)
10. Abbreviations in shipping (No longer online)

Computing (1 matching dictionary)

11. BABEL: Computer Oriented Abbreviations and Acronyms (No longer online)

Medicine (1 matching dictionary)

12. online medical dictionary (No longer online)

Miscellaneous (2 matching dictionaries)

13. UU: Acronym Finder
14. AbbreviationZ (No longer online)

Slang (1 matching dictionary)

15. UU, u.u: Urban Dictionary

Definitions from Wiktionary (UU) ▸ noun:  (religion) Initialism of Unitarian Universalist. [A follower of Unitarian Universalism.] ▸ noun:  Initialism of Utrecht University. Similar: 0, 101, 103, 12a, 13, 130, 1A, 1B, 1D, 2A, more... ▸ Words similar to uu ▸ Usage examples for uu ▸ Idioms related to uu ▸ Wikipedia articles (New!) ▸ Popular adjectives describing uu ▸ Words that often appear near uu ▸ Rhymes of uu ▸ Invented words related to uu