incurable UK /ˌɪnˈkjʊəɹəbl/US /ˌɪnˈkjʊɹəbl/adjective 2noun 1forms 1 adjective2 •Of an illness, condition, etc, that is unable to be cured; healless.They were labouring under a profound, and, as it might have seemed, an almost incurable ignorance. — 1854 •(figurative) Irremediable, incorrigible. noun1 •One who cannot be cured. formsincurables