Open string is a term used by guitarists and other string instrument players to refer to a string that is being played without fretting. It produces a distinct, resonant sound. There are various synonyms for open string, including open note, unfretted note, natural note, and unpressed string. These synonyms are interchangeable and used according to the context of the musician's dialogue. Open strings are often used as a starting note or for drone notes in various styles of music. They are essential for developing finger picking technique, and playing chords higher up on the neck. Players with a deep understanding of open strings are highly respected in musical circles.