the guitar player thought that the next song called for a fuller, richer guitar sound, so he put down his regular guitar and picked up his 12 string
a guitar with 12 strings grouped in pairs, instead of the normal 6 strings spaced apart from each other
"the guitar player thought that the next song called for a fuller, richer guitar sound, so he put down his regular guitar and picked up his 12 string" What is the definition of "12 string"?