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

Keep scrolling for more

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 Engadget reports that an update rolling out today allows Chromecasts to be added to speaker groups, a handy feature for those who want to combine multiple Google Cast-compatible devices for simultaneous audio streaming. Dani Deahl, The Verge, "Chromecasts now support multi-room music playback," 19 Nov. 2018 North Korea's logic is that both sides need to take simultaneous action to gradually improve the security climate. Eric Talmadge, Fox News, "Analysis: Returning remains good, but easy, move for N.Korea," 27 July 2018 So what better way to celebrate those two simultaneous birthdays than to combine them? Christian Holub, EW.com, "Watch Batman and Friends celebrate their birthdays together in exclusive video," 17 Sep. 2019 Netflix has argued for the benefits of simultaneous availability. cleveland.com, "Amazon Studios, once the anti-Netflix, appears to be turning into it," 16 Sep. 2019 An arms dealer and a group of terrorists plan to use three plutonium cores for a simultaneous nuclear attack. Los Angeles Times, "Movies on TV this week Sept. 15, 2019: ‘Alien,’ ‘Aliens’ and more," 13 Sep. 2019 In 2004, at the height of Iraq’s sectarian violence, 143 people were killed in near simultaneous suicide and other bombings at shrines in Baghdad and Karbala during the Ashoura procession. BostonGlobe.com, "Afdhal al-Shami, a shrine official, denied that there was a collapse or any cracks in the walkway. ‘‘It was a stampede that led to this incident,’’ he said.," 11 Sep. 2019 In 2004, at the height of Iraq's sectarian violence, 143 people were killed in near simultaneous suicide and other bombings at shrines in Baghdad and Karbala during the Ashoura procession. Qassim Abdul-zahra And Zeina Karam, chicagotribune.com, "Officials: At least 31 Iraqi pilgrims die in stampede during holiday," 10 Sep. 2019 In 2004, at the height of Iraq’s sectarian violence, 143 people were killed in near simultaneous suicide and other bombings at shrines in Baghdad and Karbala during the Ashoura procession. Washington Post, "Officials: 31 Iraqi pilgrims die in stampede during holiday," 10 Sep. 2019

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.

See More

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

Keep scrolling for more

Learn More about simultaneous

Statistics for simultaneous

Last Updated

20 Oct 2019

Time Traveler for simultaneous

The first known use of simultaneous was circa 1660

See more words from the same year

Keep scrolling for more

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

Keep scrolling for more

Comments on simultaneous

What made you want to look up simultaneous? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to engage in dissolute behavior

Get Word of the Day daily email!

Test Your Vocabulary

Pass the Little Ribbons: A Pasta Word Quiz

  • rotelle pasta
  • Match the pasta to its meaning in English: Rotelle
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!