(~s)
1.
A ~ is something that is accepted as true but is not certain to be true.
...the ~ that a defendant is innocent until proved guilty...
= assumption
N-COUNT
2.
If you describe someone’s behaviour as ~, you disapprove of it because they are doing something that they have no right to do. (FORMAL)
They were angered by his ~.
N-UNCOUNT disapproval