In music, the act, theory, or result of singing in harmony—that is, with two or more independent parts or voices; choral singing: opposed to solo-singing.(noun)
The Century Dictionary (Public Domain)
Use "part-singing" in a sentence
"In a few more generations, all churches will have converted to praise bands, and no one will know what part-singing is anymore except those who get together to sing Beethoven 9 every now and then."
"It began with the transition from the Continental counterpoint of the 14th century under the influence of English composers – an influence manifested above all in the preference for third and sixths in parallel motion probably a resut of improvised part-singing against a plainsong hymn, and for counterpoint containing very few dissonances."
"A mysterious bosom it appeared, upon a damp, dark, Sunday night, dashed through in the train to the music of the whirling wheels, the panting of the engine, and the part-singing of hundreds of third-class excursionists, whose vocal efforts"