assumption
/əˈsʌmpʃən/noun
1
- a thing that is accepted as true or as certain to happen, without proof（无证据的）假定; 臆断：
they made certain assumptions about the market
他们对市场做了一些推测
with clause we're working on the assumption that the time of death was after midnight.我们正按死亡时间在午夜以后的假设开展工作。
2
- mass noun the action of taking or beginning to take power or responsibility上任; 就职。
3
Assumption
the reception of the Virgin Mary bodily into heaven. This was formally declared a doctrine of the Roman Catholic Church in 1950.圣母升天（1950年被正式宣布为罗马基督教教义之一）。参见 DORMITION.
3.1
- the feast in honour of this, celebrated on 15 August圣母升天节（8月15日）。
4
- mass noun archaic arrogance or presumption〈古〉傲慢; 自以为是。
词源
Middle English (in sense 3)： from Old French asompsion or Latin assumptio（n-）， from the verb assumere （see ASSUME）.