(music) A musical instrument consisting of a flat sounding box with numerous strings placed on a horizontal surface, played with a plectrum or fingertips.
(music, translations) Related or similar instruments in other cultures, such as the Chinese guqin or Norwegian harpeleik; especially any chordophone without a neck, and with strings that pass over the body.
verb
To play a zither.
1999, Richard Hacken (translator), “Mary in Misery” by Peter Rosegger in Into the Sunset: Anthology of Nineteenth-Century Austrian Prose, Riverside, CA: Ariadne Press, pp. 413-414,
We traveled far and wide: he played the zither while I sang an accompaniment. […] He keeps zithering, and I sing like before, and before long we’ve put together a pretty good pile of money . . .
To make a sound similar to that made by a zither; to move while making such a sound.
c. 1890, May Ostlere, Dead! London: Trischler, Chapter 3, p. 76,
Now [the wind] swithered through the badly-fixed windows, making zithering sounds as of an army of cold and frozen-out mosquitoes […]