əˈsuːm pɹɪˈzjuːm pɹiˈz(j)um pɹɪˈzjuːm pɹɘˈzjʉːm take liberties or act with too much confidence take to be the case or to be true; accept without verification or proof I assume his train was late constitute reasonable evidence for A restaurant bill presumes the consumption of food take upon oneself; act presumptuously, without permission How dare you call my lawyer?