donatio mortis causaPronunciation: /dəˌneɪʃɪəʊ ˌmɔːtɪs ˈkɔːzə/Definition of donatio mortis causa noun (plural donationes mortis causa /dəˌneɪʃɪˈəʊniːz/) Law a gift of personal property made by someone who expects to die in the immediate future, taking full effect only after the donor dies. Origin:Latin, literally 'gift by reason of death'