Definitions

1. verb

to take or assume something to be true or to be the case, often without proof or evidence

“She presumed that he was already at the party.”

2. verb

to take it upon oneself to do something, often without permission or authority

“The team presumed responsibility for completing the project.”

3. noun

a feeling of confidence or certainty about something

“His presumption of success led him to make bold business decisions.”

4. noun

an assumption or hypothesis, especially one that is not supported by evidence

“The scientist’s presumption about the new theory was later proven to be incorrect.”