assumption

noun
as·​sump·​tion | \ ə-ˈsəm(p)-shən How to pronounce assumption (audio) \

Definition of assumption

1 : a taking to or upon oneself the assumption of a new position
2 : the act of laying claim to or taking possession of something the assumption of power
3a : an assuming that something is true a mistaken assumption
b : a fact or statement (such as a proposition, axiom (see axiom sense 2), postulate, or notion) taken for granted
4a : the taking up of a person into heaven
b capitalized : August 15 observed in commemoration of the Assumption of the Virgin Mary
5 : the taking over of another's debts

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Examples of assumption in a Sentence

I made the assumption that he was coming, so I was surprised when he didn't show up. He will come home tomorrow. At least, that's my assumption. Many scientific assumptions about Mars were wrong. I'm telling you our arrival time on the assumption that you will check to see whether or not our flight is on time before you come to the airport. Her plan is based on the underlying assumption that the economy will improve in the near future. her assumption of the presidency the buyer's assumption of debt
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Recent Examples on the Web

The assumption is that the more miles a fleet has driven, the better the software must be. Jon Porter, The Verge, "Uber manager raised concerns about self-driving program just days before fatal collision," 11 Dec. 2018 Meredith Whittaker: The realities within these companies, the culture within these companies, the assumption, the life experience of the people in these companies are inscribed in these technologies and remapped onto the world. Shirin Ghaffary, Recode, "After 20,000 workers walked out, Google said it got the message. The workers disagree.," 21 Nov. 2018 The assumption that Cousins will be on his best behavior with the Warriors is not universal. Scott Ostler, SFChronicle.com, "With ‘Boogie,’ Warriors shoot into ‘death zone’," 9 July 2018 The day after, or the series after, or the season after teams have a heated moment, the assumption is that the offending incident will linger into the next game. Jeff Wilson, star-telegram, "Banister on Angels' reaction to slide: 'Our shortstop's getting well, though'," 2 June 2018 Deduction assumptions: Agent fees ($400K), offseason training ($50K), union dues ($15K), tax preparation fees ($6K) and state income ($1.2M in California and $100K in other states). Mark Goldstick, SI.com, "How Trump's New Tax Bill Will Impact Star Athletes," 17 Apr. 2018 This is another example of making assumptions without knowing what’s going on behind the scenes. Caitlin Flynn, Allure, "7 Things You Shouldn't Say to Someone With a Chronic or Invisible Illness," 16 Oct. 2018 Nobody wants to jinx anything, nobody wants to make any assumptions. Ann Killion, SFChronicle.com, "Warriors-Cavs Game 4: The trophy and champagne are in the building," 8 June 2018 The prospect of a Warriors-Celtics matchup in the Finals is so deliciously appealing, one hesitates to make assumptions. Bruce Jenkins, San Francisco Chronicle, "Warriors, Celtics: It feels like a collision course," 15 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'assumption.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of assumption

13th century, in the meaning defined at sense 4a

History and Etymology for assumption

Middle English, from Late Latin assumption-, assumptio taking up, from Latin assumere — see assume

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Statistics for assumption

Last Updated

8 Apr 2019

Look-up Popularity

Time Traveler for assumption

The first known use of assumption was in the 13th century

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More Definitions for assumption

assumption

noun

English Language Learners Definition of assumption

: something that is believed to be true or probably true but that is not known to be true : something that is assumed
: the act of beginning a role, duty, etc.
: the act of taking or beginning to have power, control, etc., in a job or situation

assumption

noun
as·​sump·​tion | \ ə-ˈsəmp-shən How to pronounce assumption (audio) \

Kids Definition of assumption

1 : the act of taking on the assumption of power
2 : something accepted as true I'm making plans on the assumption that you will be here.

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Comments on assumption

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