barbershop
/ˈbɑːbəʃɒp/noun
1- chiefly N. Amer. a shop where a barber works〈主北美〉理发店。
1.1
- mass noun [often as modifier] a popular style of close harmony singing, typically for four male voices理发店男声四重唱。
- ORIGIN: from the custom in the 16th and 17th cents of passing time in a barber's shop by harmonizing to a lute or guitar provided to entertain customers waiting their turn.