A dulcimer is a stringed musical instrument that is typically played by plucking or strumming the strings. It has a long, narrow body and is often made of wood. There are two main types: the hammered dulcimer, which is played with small mallets, and the Appalachian dulcimer, which is usually played on the lap and strummed or plucked with the fingers. The dulcimer has roots in folk music, particularly in the United States, where it became popular in the 19th century. It is known for its sweet, melodic sound and is often used in traditional and contemporary music settings.