Open English Wordnet
Nouns
(n)presumption(law) an inference of the truth of a fact from other facts proved or admitted or judicially noticed
(n)presumption, presumptuousness, effrontery, assumptionaudacious (even arrogant) behavior that you have no right to“he despised them for their presumptuousness”
(n)presumptiona kind of discourtesy in the form of an act of presuming“his presumption was intolerable”