Definition, synonyms and related words
Third-person singular simple present indicative form of assume
"She assumes that everyone has read the memo by now."
In plain English: To assume means to take something for granted without checking if it is true.
"She assumes that everyone will be on time for the meeting."
Usage: Use assumes to describe when someone takes something for granted without proof or makes an assumption about a situation. It is the third-person singular form used with subjects like he, she, it, or a specific name in the present tense.
From Latin assumere, combining ad- (to) and sumere (to take), originally meaning to take up or undertake something. It evolved in English to mean accepting an idea as true without proof or taking on a role or responsibility.