simultaneous

[ sahy-muhl-tey-nee-uhs, sim-uhl- ]

/ ˌsaɪ məlˈteɪ ni əs, ˌsɪm əl- /

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See synonyms for: simultaneous / simultaneity / simultaneously / simultaneousness on Thesaurus.com

adjective

existing, occurring, or operating at the same time; concurrent: simultaneous movements;simultaneous translation.

OTHER WORDS FOR simultaneous

synchronous, coincident.

See synonyms for simultaneous on Thesaurus.com

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CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of simultaneous

First recorded in 1650–60; from Latin simul “together” (see similar) + (instan)taneous

OTHER WORDS FROM simultaneous

si·mul·ta·ne·ous·ly, adverbsi·mul·ta·ne·ous·ness, si·mul·ta·ne·i·ty

[sahy-muhl-tuh-nee-i-tee, sim-uhl-], /ˌsaɪ məl təˈni ɪ ti, ˌsɪm əl-/, nounnon·si·mul·ta·ne·ous, adjectiveun·si·mul·ta·ne·ous, adjective

un·si·mul·ta·ne·ous·ness, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use simultaneous in a sentence

That would require a simultaneous effort, in the United States and around the world.
Why staying cold is so important to a Covid-19 vaccine|Umair Irfan|December 11, 2020|Vox
Amid simultaneous public health and economic crises, the need to create long-term solutions that support caregivers and their families is urgent.
It’s time to prioritize caregiving, America|Andrew Nusca|November 11, 2020|Fortune
This is especially relevant now as new research indicates excitement around “digital twins” — in which a live physical event features a simultaneous virtual event, doubling as an option for consumers to attend instead.
How 5G and immersive experiences are changing live event participation|Verizon|November 11, 2020|Digiday
She always referred to Joe as “The Bum,” which she would accompany with a simultaneous head snap and thumb point in his direction.
Making the Most of Playing Hooky for the World Series|Eugene Robinson|October 25, 2020|Ozy

The simultaneous eruptions in Russia’s “near abroad” have led to claims in pro-Kremlin media of a Western conspiracy, the NYT’s Anton Troianovski notes.
Russia’s sphere of influence is spinning out of control|Dave Lawler|October 8, 2020|Axios
And, as far as the laws of simultaneity would allow, it was midnight in Greenwich, England.
Unwise Child|Gordon Randall Garrett
Someday we'll reach true simultaneity—enter warp, and come out just where we want to be, at the same time.
The Colors of Space|Marion Zimmer Bradley
Phenomena in nature stand to each other in two relations, that of simultaneity, and that of succession.
Analysis of Mr. Mill's System of Logic|William Stebbing
We have not a direct intuition of simultaneity, nor of the equality of two durations.
Major Prophets of To-Day|Edwin E. Slosson
The qualitative problem of simultaneity is made to depend upon the quantitative problem of the measurement of time.
The Foundations of Science: Science and Hypothesis, The Value of Science, Science and Method|Henri Poincar

British Dictionary definitions for simultaneous

simultaneous

/ (ˌsɪməlˈteɪnɪəs, US ˌsaɪməlˈteɪnɪəs) /

adjective

occurring, existing, or operating at the same time; concurrent

noun

chess a display in which one player plays a number of opponents at once, walking from board to boardSometimes shortened to: simul

Derived forms of simultaneous

simultaneously, adverbsimultaneousness or simultaneity (ˌsɪməltəˈniːɪtɪ, US ˌsaɪməltəˈniːɪtɪ), noun

Word Origin for simultaneous

C17: formed on the model of instantaneous from Latin simul at the same time, together

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

simultaneous

OTHER WORDS FOR simultaneous

Origin of simultaneous

OTHER WORDS FROM simultaneous

Words related to simultaneous

How to use simultaneous in a sentence

British Dictionary definitions for simultaneous

Derived forms of simultaneous

Word Origin for simultaneous