a zither-like musical instrument used in country-and-western music, equipped with button-controlled dampers that can prevent selected strings from sounding, thus allowing chords to be played. It is plucked with the fingers or a plectrum
Autoharp in American English
(ˈɔtoʊˌhɑrp)
US
trademark
1.
a type of zither for playing chordal accompaniments by means of a series of dampers worked by keys