acappella
adjective/adverbUK /ˌæ kəˈpɛl.ə/
US /ˌɑː kəˈpɛl.ə/
Singing without any music playing behind you.
The choir sang the song a cappella, with no piano or guitar.
OTHER MEANINGS
2. Music made only by voices, with no instruments.
Their album is full of a cappella tracks.
3. A style of group singing where people copy instrument sounds with their mouths.
The a cappella group made drum sounds with their lips.
4. Done in the old chapel singing style, named after church music.
The old a cappella tradition comes from church choirs.