as·sump·tion/ə`sʌmpʃən; əˈsʌmpʃən/ n [C] 1 something that you think is true although you have no proof 假定,假设: + that the assumption that computers can solve all our problems 电脑能解决我们一切问题的假设 on the assumption that We're working on the assumption that prices will continue to rise. 我们是在假定价格会持续上升的情况下工作的。 2 assumption of when someone starts to take power, starts an important job etc …的承担[就任]: On its assumption of power, the new government promised an end to the war. 新政府开始执政时曾许诺要结束战争。