[n] the act of taking possession of or power over something; "his assumption of office coincided with the trouble in Cuba"; "the Nazi assumption of power in 1934"; "he acquired all the company's assets for ten million dollars and the assumption of the company's debts"
[n] the act of assuming or taking for granted; "your assumption that I would agree was unwarranted"
[n] audacious (even arrogant) behavior that you have no right to; "he despised them for their presumptuousness"
[n] a hypothesis that is taken for granted; "any society is built upon certain assumptions"
[n] a statement that is assumed to be true and from which a conclusion can be drawn; "on the assumption that he has been injured we can infer that he will not to play"
[n] (Christianity) the taking up of the body and soul of the Virgin Mary when her earthly life had ended
[n] celebration of the Virgin Mary's being taken up into heaven when her earthly life ended