A musical instrument is a device constructed or modified for the purpose of making music. In principle anything that produces sound can serve as a musical instrument. The expression, however, is reserved generally for items that have a specific musical purpose. The academic study of musical instruments is called organology.

Some examples of instruments are - trumpet, bassoon, trombone, flute, clarinet, oboe, piccolo, saxophone, violin, viola, violoncello, piano, guitar, bass, lute, koto, sitar, bagpipe, drum, xylophone, pipe organ, theremin, synthesizer, aeolian harp, etc.