pre·sump·tion/prɪ`zʌmpʃən; prɪˈzʌmpʃən/ n 1 [C] something that you suppose is true because it seems very likely 设想; 假定; 推测: the presumption that Evans was guilty 伊文斯有罪的假定 2 [U] when someone confidently does something that they have no right to do 擅作主张,放肆,冒昧