acoustic musics.
either music made acoustic
or music that was written electric then made acoustic.
by spencershadows January 7, 2008
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1) A musical instrument that is not electric
2) A musical performance that uses no electric instruments (aside from microphones and similar amplification)
1) Jimi Hendrix played an electric guitar on the song "Purple Haze", but Paul Simon played an acoustic guitar on Simon & Garfunkel's "Mrs. Robinson". Techno and dance music uses electric drums, but rock music typically sticks to acoustic drums.

2) Eric Clapton's band did an acoustic show on "Mtv Unplugged".
by Bill M. August 28, 2004
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a musical instrument which produces its normal sound through the sounding board and is not amplified in any way
Mumford and Sons is an Acoustic Band, that uses all Acoustic instruments.
by ilovemumfordmorethenanything September 25, 2012
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A word to describe Cleavage, the space in your mouth while giving a blow-job, or how tight you are.
Mmmmm that girl's got some nice acoustics!
by asmondaus March 30, 2010
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Autistically attracted to music
person: *enjoying bad music*
some guy: YoU'rE aCoUsTiC
person: 00F
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A person who has autism.
Wow! Would you look at that guy, he is proper acoustic.
by JenoBeno October 9, 2023
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