PRESUME

vt to assume or take beforehand; ·esp., to do or undertake without leave or authority previously obtained.

2. presume ·vi to suppose or assume something to be, or to be true, on grounds deemed valid, though not amounting to proof; to believe by anticipation; to infer; as, we may presume too far.

3. presume ·vt to take or suppose to be true, or entitled to belief, without examination or proof, or on the strength of probability; to take for granted; to infer; to suppose.

4. presume ·vi to venture, go, or act, by an assumption of leave or authority not granted; to go beyond what is warranted by the circumstances of the case; to venture beyond license; to take liberties;

— often with on or upon before the ground of confidence.