What is the best description of a zither-?

A zither is a stringed musical instrument that typically has a flat, rectangular soundboard and strings that are stretched across it. The strings are usually plucked with the fingers or a plectrum and the instrument is often used in folk music. Zithers come in a variety of shapes and sizes, and are popular in many parts of the world. Some well-known types of zithers include the Appalachian dulcimer, the Chinese guzheng, and the Indian santoor.