The definition of bravissimo is an Italian word used to express highest praise.(interjection)
An example of bravissimo is what one might say to a singer who has just completed a fantastic performance in an opera.
See bravissimo in Webster's New World College Dictionary
Origin: It, superl. of bravo
See bravissimo in American Heritage Dictionary 4
Origin: , superlative of bravo, fine; see bravo1.