/bahr"beuhr shop'/ , n.
1. Also called, esp. Brit., barber's shop . the place of business of a barber.
2. the singing of four-part harmony in barbershop style or the music sung in this style.
adj.
3. specializing in the unaccompanied part-singing of popular songs in which four voices move in close, highly chromatic harmony: a barbershop quartet.
4. characteristic of such part-singing.
[ 1570-80; BARBER + SHOP ]