We found 5 dictionaries that define the word u3:

General (2 matching dictionaries)

1. U3: Dictionary.com
2. U3 (Berlin U-Bahn), U3 (Frankfurt U-Bahn), U3 (Hamburg U-Bahn), U3 (Nuremberg U-Bahn), U3 (USB storage specification), U3 (Vienna U-Bahn), U3 (software), U3: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

3. U3: Encyclopedia

Miscellaneous (1 matching dictionary)

4. U3: Acronym Finder

Slang (1 matching dictionary)

5. U3: Urban Dictionary

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