simultaneously
Americanadverb
Other Word Forms
Etymology
Origin of simultaneously
Explanation
Use the adverb simultaneously to describe actions that occur at the same time. You are reading this sentence and simultaneously learning a new word! Simultaneously doesn’t have to describe two different actions. It just means that things are happening at the same time. If a presidential debate is broadcast simultaneously on three television channels, “broadcast” is the only action but it’s happening in three places at once.
Vocabulary lists containing simultaneously
Vocabulary from the Introduction to "Reality is Broken" by Jane McGonigal
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The Devil's Arithmetic
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Drums, Girls, and Dangerous Pie
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The new framework addresses this challenge by modeling multiple factors simultaneously.
From Science Daily • Jun. 29, 2026
A high-energy laser that cannot precisely track a target moving at speed, or that cannot prioritize among dozens of incoming threats simultaneously, is just an extremely expensive light source.
From MarketWatch • Jun. 29, 2026
Yet two of them cannot simultaneously be true.
From The Wall Street Journal • Jun. 29, 2026
The lab's main hope meanwhile is to produce two Higgs Bosons simultaneously, which would be a first, and see them interact, Asbah said.
From Barron's • Jun. 27, 2026
He looked at me for an instant with a serious expression, and then we both broke out simultaneously in wild laughter.
From "Just Mercy" by Bryan Stevenson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
