Definition from Wiktionary, the free dictionary
- (Can we verify(+) this sense?) superlative form of : most forte
- (music) The musical notation indicating that the piece is played louder than fortissimo.
superlative of forte
louder than fortissimo
fortississimo (plural fortississimos)
- (music) The dynamic sign indicating that the piece should be played louder than fortissimo. Abbreviation: fff.