harp

1. a large triangular plucked stringed instrument consisting of a soundboard connected to an upright pillar by means of a curved crossbar from which the strings extend downwards. The strings are tuned diatonically and may be raised in pitch either one or two semitones by the use of pedals (double-action harp). Basic key: B major; range: nearly seven octaves

2. an informal name (esp in pop music) for harmonica