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

Ebola virus disease first appeared in 1976 in two simultaneous outbreaks in Africa, WHO notes. NBC News, "What is Ebola? What to know about symptoms, vaccine, outbreaks," 12 June 2019 The district is now seeking input from community members on whether or not there is interest in continuing to live stream the meetings while staff is investigating potential options for simultaneous closed captions. Daily Pilot Staff, latimes.com, "Around Town: Wooden Boat Festival coming to Newport Beach this weekend," 6 June 2019 The lack of effect on BM or BMI was the result of the simultaneous decrease in FM and increase in LM. Mackie Shilstone, nola.com, "Are beer & exercising compatible?," 5 June 2019 Some family plans cost a few bucks extra a month, but many offer multiple accounts and simultaneous streams by default. David Pierce, WSJ, "33 Mostly Free Ways to Fix Your Family’s Tech Problems," 23 Dec. 2018 Luckin Coffee, the largest coffee chain in the country after Starbucks, is looking to raise up to $560 million in a Nasdaq IPO and a simultaneous share placement to commodities trader Louis Dreyfus. Jacky Wong, WSJ, "A Rival to Starbucks in China Brews Up a Frothy IPO," 13 May 2019 Getting observing time at even one telescope is challenging for a typical astronomer; getting simultaneous observations at over half a dozen telescopes required a lot of negotiations. Avery Thompson, Popular Mechanics, "Behind the Scenes of the First Black Hole Photo," 12 Apr. 2019 The strangely simultaneous outbreaks are both officially over, as of Monday, when there had been no new cases in 42 days, or two full incubation periods. Andy Marso, kansascity, "Kansas City's two measles outbreaks are over. But what did they cost taxpayers?," 11 June 2018 The nearly simultaneous return to fundraising mode of Thoma Bravo and Vista could force some investors who have backed both firms to go with only one, an investment consultant said. Laura Cooper And Dawn Lim, WSJ, "Private-Equity Tech Titans Face Off With New Funds," 16 May 2018

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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Statistics for simultaneous

Last Updated

16 Jun 2019

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Time Traveler for simultaneous

The first known use of simultaneous was circa 1660

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More Definitions for simultaneous

simultaneous

adjective

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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