barbershop

noun

1. Also called, especially British, 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.

adjective

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.

noun

1. mainly US the premises of a barber
2. (modifier) denoting or characterized by a type of close four-part harmony for male voices, popular in romantic and sentimental songs of the 1920s and 1930sa barbershop quartet