v. 1 tr. (often foll. by that + clause) suppose to be true; take for granted. 2 tr. (often foll. by to + infin.) a take the liberty; be impudent enough (presumed to question their authority). b dare, venture (may I presume to ask?). 3 intr. be presumptuous; take liberties. 4 intr. (foll. by on, upon) take advantage of or make unscrupulous use of (a person's good nature etc.). presumable adj. presumedly adv.
[ ME f. OF presumer f. L praesumere praesumpt- anticipate, venture (as PRAE-, sumere take) ]