I. adverb or adjective Etymology: Italian, superlative of forte Date: 1724 very loud, II. noun (plural -mos or fortissimi) Date: 1856 a very loud passage, sound, or tone
FORTISSIMO
Meaning of FORTISSIMO in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012