[ pri-zuhmp-shuhn ]
See synonyms for presumption on
  1. the act of presuming.

  2. assumption of something as true.

  1. belief on reasonable grounds or probable evidence.

  2. something that is presumed; an assumption.

  3. a ground or reason for presuming or believing.

  4. Law. an inference required or permitted by law as to the existence of one fact from proof of the existence of other facts.

  5. an assumption, often not fully established, that is taken for granted in some piece of reasoning.

  6. unwarrantable, unbecoming, or impertinent boldness.

Origin of presumption

1175–1225; Middle English: effrontery, supposition <Latin praesūmptiōn- (stem of praesūmptiō) anticipation, supposition, Late Latin: presumptuousness, equivalent to praesūmpt(us) (past participle of praesūmere to undertake beforehand; see presume) + -iōn--ion

Other words for presumption

Other words from presumption

  • o·ver·pre·sump·tion, noun

Words that may be confused with presumption

Words Nearby presumption Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use presumption in a sentence

British Dictionary definitions for presumption


/ (prɪˈzʌmpʃən) /

  1. the act of presuming

  2. bold or insolent behaviour or manners

  1. a belief or assumption based on reasonable evidence

  2. a ground or basis on which to presume

  3. law an inference of the truth of a fact from other facts proved, admitted, or judicially noticed

Origin of presumption

C13: via Old French from Latin praesumptiō a using in advance, anticipation, from praesūmere to take beforehand; see presume

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012