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

There was an early assumption that the United States would win this World Cup at a canter after blowing away Thailand in a record 13-0 win in their Group F opener. SI.com, "Women's World Cup Final Preview - USA vs Netherlands: How to Watch, Team News, Prediction & More," 4 July 2019 But this may be an ungenerous assumption about human nature, according to an expansive new study that found people are more likely to try and return lost wallets with money than those without. Brigit Katz, Smithsonian, "People Are Surprisingly Honest About Returning Lost Wallets," 21 June 2019 As Bloomberg points out, Bumble is not expecting to turn a profit with its Soho restaurant, which might be the only rational assumption in this whole endeavor. Amanda Shapiro, Bon Appétit, "A Place to Date," 6 June 2019 Rules and regulations are often based on the assumption that runners have male bodies. The Economist, "For women, running is still an act of defiance," 28 June 2019 Along with an ample dusting of bronzer—a requisite when your aesthetic centers on the assumption that the beach is always mere steps away—Emrata opted for a swirl of peachy blush. Calin Van Paris, Vogue, "Emily Ratajkowski Has a Surprising Trick to Achieve the Perfect Summer Glow," 27 June 2019 The old model was built on the assumption that a large charitable organization like United Way could raise and distribute money to groups throughout the community more effectively and efficiently than individual groups alone. And, Cincinnati.com, "More woes for United Way: Why is the agency spending more money and raising less?," 26 June 2019 Our long-range predictions—especially those which anticipate extreme-weather events—rely on an assumption that the future will be similar to the past. Hannah Fry, The New Yorker, "Why Weather Forecasting Keeps Getting Better," 24 June 2019 Russia rejected both of these, but U.S. policymakers proceeded with these policies anyway on the assumption that sooner or later Russia would recognize what was good for it. Eugene Rumer, Time, "How to Reset U.S.-Russian Relations Today," 20 June 2019

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

15 Jul 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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