Autoharp

[ aw-toh-hahrp ]
/ ˈɔ toʊˌhɑrp /

Trademark.

a zither having buttons that when depressed damp all strings except those to be sounded, the undamped strings being strummed to produce simple chords.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for autoharp

Autoharp
/ (ˈɔːtəʊˌhɑːp) /

noun

trademark 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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012