What does the term "acoustic guitar" refer to and how does it differ from other types of guitars?

An acoustic guitar is a type of guitar that produces sound through the vibration of its strings, which are amplified by the hollow body of the instrument. This is different from electric Guitars, which require an amplifier to produce sound. Acoustic guitars are often used in folk, country, and singer-songwriter music, while electric guitars are more common in rock and pop genres.