|Origin:||présumer, from Latin praesumere, from sumere 'to take'|
to think that something is true, although you are not certain [= assume]:
Each of you will make a speech, I presume?
'Are his parents still alive?' 'I presume so.'
I presume we'll be there by six o'clock.
presume somebody/something to be somebody/something
From the way he talked, I presumed him to be your boss.
be presumed to do something
The temple is presumed to date from the first century BC.
to accept something as true until it is shown to not be true, especially in law [= assume]:
We must presume innocence until we have evidence of guilt.
be presumed dead/innocent etc
Their nephew was missing, presumed dead.
3 [intransitive] formal
to behave without respect or politeness by doing something that you have no right to do
presume to do something
I would never presume to tell you what to do.
4 [transitive usually in present tense] formal
to accept something as being true and base something else on it [= presuppose]:
The Ancient History course presumes some knowledge of Greek.
I presume that someone will be there to meet us when we arrive.
to unfairly ask someone for more than you should, because they are your friend, are generous etc:
It would be presuming on his generosity to ask him for money.