germane UK /dʒɜː(ɹ)ˈmeɪn/US /d͡ʒɝˈmeɪn/noun 2adjective 1forms 3 noun2 •germanium tetrahydride, GeH₄ •[in compounds] Any organic derivative of this compound. adjective1 •Related to a topic of discussion or consideration.Yet this much is germane to the present inquiry: — 1924 formsgermanes · more germane · most germane