A "hollow-body" refers to a type of musical instrument, particularly guitars, that features a hollow interior. This design enhances the instrument's resonance and produces a warmer, fuller sound. Hollow-body guitars are often used in genres like jazz and blues, where rich tones are desired. In addition to guitars, the term "hollow-body" can also apply to other instruments, such as certain types of violins or brass instruments. The hollow construction allows for better sound projection and can influence the overall tonal quality, making it a popular choice among musicians seeking a unique sound.