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1.
Lyrics on its own with no music..
This record has an acapella, maybe i can record the vocals and make a bootleg from it!
by pRopS November 16, 2003
 
2.
music that uses no instruments besides vocal ones. just voices harmonizing to create music
Bobby Mcferrins 80's hit don't worry be happy was an acapella song. no instruments were used besides his voice
by sahgducks June 30, 2005
 
3.
A cappella (Italian): like the chapel

Vocal music without instrumental accompaniment.
The band died when they cut power but Sid just sang acapella in the dark like he never heard them anyway.
by yogipete July 20, 2008
 
4.
The first definition is wrong, A cappella is not using any instruments but the background music is usually accompanied by beats made by the human mouth, usually one linking to the other one, like hitting the floor, then the desk, then the wall to make a beat that goes together, then it is accompanied by the actually singing, A Capella can only be accomplished by separate recording of different sounds, or a group working together
Go to youtube and check out The Temptations-My Girl-A Capella(MrVoxter)

Check this out, this is an A Capella and a really good one
by Ronald Hugo July 20, 2011
 
5.
rapping without a beat
who did his beat for the battle?

we went acapella
by kash-money-if March 12, 2005
 
6.
A genre of music without there being any actual background music. It is usually used by rappers.
At the end of the last rap battle in 8 Mile, B. Rabbit says: "**** the beat, i go a capella" and carries on rapping without the backing music.
by Chris Mead April 11, 2006