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

Contingency planning historically has been drawn up around the unspoken assumption that the emergency was a nuclear exchange with the Soviet Union. Ed Burmila, The New Republic, "If Trump wanted to give himself sweeping new powers, could anyone stop him?," 13 June 2019 But experts disagreed, pointing out that the president’s budgets relied on very optimistic growth assumptions and hefty cuts to domestic programs that were a non-starter in Congress. The Washington Post, The Mercury News, "GOP leaders admit tax cuts may not pay for themselves," 11 June 2019 Including the assumption of debt, the deal is worth $683 million. Jeffrey A. Trachtenberg, WSJ, "Readerlink Works Toward Higher Offer for Barnes & Noble," 10 June 2019 Scientists from the United States and the United Kingdom attempted to reconcile highly divergent assumptions about snow cover and cloud behavior to better compare differing climate-change models. Rafil Kroll-zaidi, Harper's magazine, "Findings," 10 June 2019 One assumption that has been central to the study of phyllotaxis, or leaf patterns, is that leaves protect their personal space. Maddie Burakoff, Smithsonian, "Decoding the Mathematical Secrets of Plants’ Stunning Leaf Patterns," 6 June 2019 Based on current assumptions about when bonds are sold and interest rates, the owner of a home assessed at $150,000 (market value of $218,000) would pay an additional $27 in taxes for the project in 2022. Jesse Leavenworth, courant.com, "Manchester voters approve $47 million school modernization project," 5 June 2019 As a result, his candidacy is challenging assumptions about what Democratic voters want in the era of President Donald Trump. Michael Scherer, The Seattle Times, "Biden tests assumptions about what Democratic voters want in Trump era," 20 May 2019 Their worst-case emissions scenario, RCP 8.5, is one in which the global economy lapses into economic and technological stagnation (contradicting an assumption on the left that stopping economic growth is the solution to climate change). Holman W. Jenkins, WSJ, "Big Names Bake a Climate Pie in the Sky," 18 Jan. 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

17 Jun 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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