simultaneous

adjective
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 simultaneously (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 In our globalized world, diseases are often transported by human carriers who hop on planes, but in this case the scientists concluded that similar changing climatic conditions in each of these places likely drove the simultaneous development. Justin Worland, Time, "The Wuhan Coronavirus, Climate Change, and Future Epidemics," 6 Feb. 2020 His daughter told him the videos only showed two of three simultaneous fights. Bisma Parvez, Detroit Free Press, "New fight club-like videos emerge from Southfield High School," 5 Feb. 2020 Eisler's comments during our interview hinted to a server capacity in the vicinity of 600,000 to 700,000 simultaneous users across 20 server farms across the globe. Sam Machkovech, Ars Technica, "RIP Stadia? Nvidia’s newly launched cloud-gaming service is (mostly) a stunner," 4 Feb. 2020 There are simultaneous investigations being conducted by the US Coast Guard and National Transportation Safety Board as well as the State Fire Marshal and federal Bureau of Alcohol, Tobacco, Firearms and Explosives. Amanda Watts, CNN, "Alabama's 8 boat dock fire victims identified, including mother and her five children," 29 Jan. 2020 The simultaneous moral indictment and financial ramifications are feared to be too great. Nick Martin, The New Republic, "There’s Nothing More American Than Native Mascots," 29 Jan. 2020 The study used a simple but nuanced game in which paired players make a series of simultaneous decisions to cooperate with or betray their partner. Matthew Hutson, Scientific American, "People Don’t Learn to Trust Bots," 26 Jan. 2020 None of those teams seemed to feature its wealth of Hall of Famers at a simultaneous apex, the defense largely showing the way in the early '70s before the offense truly flourished later in the decade. Nate Davis, USA TODAY, "The 54 greatest teams to play in the Super Bowl: 49ers have three in top 10, but not No. 1," 24 Jan. 2020 Many health resources in Congo this year also have been devoted to the simultaneous outbreak of Ebola, which has become the second worst in history after the 2014-2016 West Africa epidemic. Fox News, "WHO: Death toll from measles outbreak in Congo hits 6,000," 8 Jan. 2020

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

10 Feb 2020

Cite this Entry

“Simultaneous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/simultaneous?pronunciation&lang=en_us&dir=s&file=simult01. Accessed 17 Feb. 2020.

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More Definitions for simultaneous

simultaneous

adjective
How to pronounce simultaneous (audio)

English Language Learners Definition of simultaneous

: happening at the same time

simultaneous

adjective
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

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Comments on simultaneous

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