simultaneous

adjective
si·​mul·​ta·​neous | \ˌsī-məl-ˈtā-nē-əs, -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, -​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

Leonard and Pollard never got up to speed with simultaneous fuel pump shaft failures on the restart. Dave Kallmann, Milwaukee Journal Sentinel, "How Bobby Unser won the '68 Indianapolis 500, and the Milwaukee man who made that happen," 24 May 2018 But chances are your school glossed over the story of the simultaneous rise of Nazism in the United States and the struggle to stop it. Eric Ginsburg, Teen Vogue, "American Nazis and Nazi Sympathizers Have Been Around Since the 1930’s," 26 Nov. 2018 That allowed a diversity of simultaneous solutions. David Roberts, Vox, "What made solar panels so cheap? Thank government policy.," 20 Nov. 2018 But stalking, a similar and often simultaneous charge, warrants up to a 5-year sentence. Scott Dance, baltimoresun.com, "Maryland's strict gun laws could not prevent Capital Gazette shooting, spurring talk of changes," 2 July 2018 But the hourlong affair was laden with insults and taunts, as both men paid loud and often simultaneous tribute to the acrimony that has typified the campaign leading up to their June 26 Republican primary. Lisa W. Foderaro, New York Times, "One’s a Felon? Eh. G.O.P. Debate Focuses on Who’s Most Like Trump.," 11 June 2018 Also, the onset of crowd synchrony and the onset of bridge wobbling are not simultaneous. Jennifer Ouellette, Ars Technica, "New study sheds more light on what caused Millennium Bridge to wobble," 30 Oct. 2018 Since the accident, Carrie has revealed a simultaneous struggle with fertility. Taysha Murtaugh, Country Living, "Carrie Underwood Shared a Close-up Look at Her Scar, and People Have a Lot of Opinions," 8 Oct. 2018 However, Secretaries of State from around the country have been opposing the bill’s mandate on post-election audits, in particular because some view it as too strict a requirement without adequate, simultaneous funding to meet the requirement. Chris Stirewalt, Fox News, "Report: Trump tabloid pal cut deal with feds," 24 Aug. 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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Last Updated

15 Dec 2018

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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 \

Kids Definition of simultaneous

: existing or taking place at the same time simultaneous events

Other Words from simultaneous

simultaneously adverb

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