simultaneously
Americanadverb
Other Word Forms
Derived 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 detector's PMTs operate simultaneously to capture tiny flashes of scintillation light produced when neutrinos interact inside the detector.
From Science Daily • Jun. 12, 2026
AI’s advances have paved the way for “a multitude of golden ages” happening simultaneously, Bezos said.
From The Wall Street Journal • Jun. 11, 2026
The event designed to simultaneously celebrate his 80th birthday and commemorate America’s 250th anniversary will take place in a massive octagon-shaped structure that has been erected on the South Lawn of the White House.
From Los Angeles Times • Jun. 11, 2026
While objecting to the subpoenas in court, the company simultaneously convinced the DOJ to drop the case, he said.
From Salon • Jun. 10, 2026
Harmony is the sounding of two notes simultaneously.
From "Music and the Child" by Natalie Sarrazin
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.
