definition of
presumption

[1] #1 presumption n. [given, precondition] an assumption that is taken for granted. wn

[2] #2 presumption n. (law) an inference of the truth of a fact from other facts proved or admitted or judicially noticed. wn

[3] #3 presumption n. [presumptuousness, effrontery, assumption] audacious (even arrogant) behavior that you have no right to; "he despised them for their presumptuousness". wn

[4] #4 presumption n. a kind of discourtesy in the form of an act of presuming; "his presumption was intolerable". wn