depone UK /dɪˈpəʊn/US /dɪˈpoʊn/ verb4 •To testify, especially in the form of a deposition.These two females did afterwards depone that Mr. Willet in his consternation uttered but one word — 1841 •To take the deposition of; to depose. •(no longer used) To lay down; to placethe obedient element / Lifts or depones its burthen — 1829 •(no longer used, rare) To lay, as a stake; to wager. formsdeponed · deponing · depones · deponeth