from The American Heritage® Dictionary of the English Language, 4th Edition
- interj. Used to express great approval, especially of a performance.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- interj. The intensive form of bravo.
from The Century Dictionary and Cyclopedia
- Superlative of bravo.
Italian, superlative of bravo, fine; see bravo1.(American Heritage® Dictionary of the English Language, Fourth Edition)
Italian bravissimo (Wiktionary)