transitive verb presumed -·sumed′, presuming -·sum′·ing

1. to take upon oneself without permission or authority; dare (to say or do something); venture
2. to take for granted; accept as true, lacking proof to the contrary; suppose
3. to constitute reasonable evidence for supposing a signed invoice presumes receipt of goods

Etymology: ME presumen < OFr presumer < L praesumere < prae-, before (see pre-) + sumere, to take: see consume

intransitive verb

1. to act presumptuously; take liberties
2. to rely too much (on or upon), as in taking liberties to presume on another's friendship
3. to take something for granted