say it: pri-ZUHMP-shuhn
presumption is a noun meaning "an assumption that is taken for granted". It carries 4 recorded senses.
an assumption that is taken for granted
(law) an inference of the truth of a fact from other facts proved or admitted or judicially noticed
law
audacious (even arrogant) behavior that you have no right to
“he despised them for their presumptuousness”
a kind of discourtesy in the form of an act of presuming
“his presumption was intolerable”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for presumption come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.