The guitar is a fretted string instrument that is usually plucked or strummed with the fingers or a pick. The standard modern guitar has six strings tuned E-A-D-G-B-E. Acoustic models amplify sound through a hollow body; electric models rely on magnetic pickups and external amplification.

Its portability, relative ease of learning basic chords, and wide expressive range have made the guitar central to folk, popular, classical, and jazz traditions. Classical guitarists use nylon strings and intricate finger technique. Electric guitarists explore distortion, sustain, and a vast array of effects.

The instrument’s repertoire spans solo works, song accompaniment, and lead or rhythm roles in ensembles. Famous guitarists have continually expanded its technical and musical possibilities. For many people the guitar is the first instrument they learn and the one they keep playing longest.

• Fretted string instrument, usually six strings
• Acoustic and electric versions
• Central to many popular and classical styles
• Played with fingers or pick