si·​mul·​ta·​neous | \ ˌsī-məl-ˈtā-nē-əs How to pronounce simultaneous (audio) , -nyəs also ˌsi- \

Definition of simultaneous

1 : existing or occurring at the same time : exactly coincident
2 : satisfied by the same values of the variables simultaneous equations

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Other Words from simultaneous

simultaneity \ ˌsī-​məl-​tə-​ˈnē-​ə-​tē , -​ˈnā-​ also  ˌsi-​ \ noun
simultaneously \ ˌsī-​məl-​ˈtā-​nē-​əs-​lē How to pronounce simultaneous (audio) , -​nyəs-​ also  ˌsi-​ \ adverb
simultaneousness noun

Choose the Right Synonym for simultaneous

contemporary, contemporaneous, coeval, synchronous, simultaneous, coincident mean existing or occurring at the same time. contemporary is likely to apply to people and what relates to them. Abraham Lincoln was contemporary with Charles Darwin contemporaneous is more often applied to events than to people. contemporaneous accounts of the kidnapping coeval refers usually to periods, ages, eras, eons. two stars thought to be coeval synchronous implies exact correspondence in time and especially in periodic intervals. synchronous timepieces simultaneous implies correspondence in a moment of time. the two shots were simultaneous coincident is applied to events and may be used in order to avoid implication of causal relationship. the end of World War II was coincident with a great vintage year

Examples of simultaneous in a Sentence

The two gunshots were simultaneous. a simultaneous release of the movie and its soundtrack on CD
Recent Examples on the Web At the same time, studios will continue to test the extent to which simultaneous home release can coexist with theatrical distribution. Frank Pallotta And Brian Lowry, CNN, "Why the future of the Oscars — like movie-going itself — remains uncertain," 25 Apr. 2021 Many classrooms became a simultaneous combination of virtual and in-person instruction, like Romero’s class in the Austin suburb of Manor. Acacia Coronado And Kantele Franko,, "During pandemic year, US teachers faced backlash over school closures, and saw a newfound respect for their work," 2 May 2021 Many classrooms became a simultaneous combination of virtual and in-person instruction, like Romero's class in the Austin suburb of Manor. Star Tribune, "Virus, technology, unrest make stressful year for teachers," 2 May 2021 The simultaneous, sweeping rethinking of these sectors is a major event. Ganesh Sitaraman, The New Republic, "The Coming Revolution in the American Economy," 29 Apr. 2021 That tells you quite a bit about the simultaneous chaos and uneventfulness of the Oscars this year. Washington Post, "Oscars 2021: 12 things to know, including Anthony Hopkins’s shocking win over Chadwick Boseman that led to a bizarre ending," 26 Apr. 2021 An employer may make simultaneous conditional job offers, but the job must go to the eligible employee with the greatest seniority who accepts it. Dan Eaton, San Diego Union-Tribune, "State and city enact new rehire rules in hospitality industry," 26 Apr. 2021 But the simultaneous rise of China and debilitating evolution of partisan conflict within the US have suddenly lent relevance to the question -- and handed Biden a political tool. John Harwood, CNN, "Biden's Wednesday speech will outline his rhetorical endgame," 25 Apr. 2021 Every coaching staff is facing a similar numbers crunch, leading to a simultaneous dive into the portal. Paul Myerberg, USA TODAY, "Oklahoma uses transfer portal, new NCAA rule to shape national football title contender," 23 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'simultaneous.' 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 simultaneous

circa 1660, in the meaning defined at sense 1

History and Etymology for simultaneous

Latin simul at the same time + English -taneous (as in instantaneous) — more at same

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Time Traveler for simultaneous

Time Traveler

The first known use of simultaneous was circa 1660

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Statistics for simultaneous

Last Updated

17 May 2021

Cite this Entry

“Simultaneous.” Dictionary, Merriam-Webster, Accessed 18 May. 2021.

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More Definitions for simultaneous



English Language Learners Definition of simultaneous

: happening at the same time


si·​mul·​ta·​neous | \ ˌsī-məl-ˈtā-nē-əs How to pronounce simultaneous (audio) \

Kids Definition of simultaneous

: existing or taking place at the same time simultaneous events

Other Words from simultaneous

simultaneously adverb

Comments on simultaneous

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