1) Broadway musical 2) Female impersonators use them 3) High parts 4) Some doo-wop voices 5) Voices of a sort 
Falsettos is a musical with a book by James Lapine and William Finn and music and lyrics by Finn. The musical consists of March of the Falsettos and Falsettoland, the last two in a trio of one-act Off-Broadway plays (the first was In Trousers). The story involves Marvin, his ex-wife Trina, his psychiatrist Mendel, his son Jason, and his gay lover ...
• (pl. ) of Falsetto