From Longman Dictionary of Contemporary Englishfortissimofor‧tis‧si‧mo /fɔːˈtɪsəməʊ $ fɔːrˈtɪsəmoʊ/ adjective, adverb APMmusic that is fortissimo is played or sung very loudly OPP pianissimo → forteOrigin fortissimo (1700-1800) Italian “loudest”, from forte; → FORTE1
