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

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 , -​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

Other than a fresh locale, the big changes for FH4 are in the number of simultaneous players—now up to 72 in a session—and seasonal transitions that join dynamic day-to-night-to day lighting and dynamic weather to keep the place looking fresh. Kyle Orland, Ars Technica, "Ars Technica’s best games of 2018," 24 Dec. 2018 The outflows come as a record share of asset classes including stocks, bonds, commodities and currencies are down this year, a rare simultaneous retreat across Wall Street that has prompted investors to direct their money elsewhere. Steven Russolillo, WSJ, "The Worst Redemptions on Record Add to Global Markets’ Pain," 18 Dec. 2018 This change in climate has been blamed for the simultaneous extinctions of a number of marine megafauna species, including the largest and most powerful predator to have ever lived—the megalodon. Jill Kiedaisch, Popular Mechanics, "Exploding Stars Might Have Brought an End to the Prehistoric Megalodon," 14 Dec. 2018 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

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

Share simultaneous

Statistics for simultaneous

Last Updated

29 Dec 2018

Look-up Popularity

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

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

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

a complex dispute or argument

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Citation

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!