We found 5 dictionaries that define the word proo:

General (4 matching dictionaries)

1. proo: Collins English Dictionary
2. proo: Wordnik
3. PROO: Wikipedia, the Free Encyclopedia
4. Proo: Rhymezone

Miscellaneous (1 matching dictionary)

5. PROO: Acronym Finder

Definitions from WordNet (Proo) ▸ name:  A surname (very rare: popularity rank in the U.S.: #68931) ▸ Words similar to proo ▸ Usage examples for proo ▸ Idioms related to proo ▸ Wikipedia articles (New!) ▸ Words that often appear near proo ▸ Rhymes of proo ▸ Invented words related to proo