simultaneously

American  

[sahy-muhl-tey-nee-uhs-lee] / ˌsaɪ məlˈteɪ ni əs li /

adverb

1. at the same time.

   By moving the chicken coop every day, we simultaneously provide the birds with fresh food and sanitary living conditions.

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Other Word Forms

• nonsimultaneously adverb
• unsimultaneously adverb

Etymology

Origin of simultaneously

simultaneous ( def. ) + -ly

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.

Example Sentences

Kraus is simultaneously an influencer and writer who is paid for her content, which includes coverage of the administration from a mostly favorable lens.

From The Wall Street Journal • Apr. 11, 2026

In this case, the virus has been modified to replicate only inside tumor cells, causing them to burst, while simultaneously triggering a more aggressive immune response from the body’s own white blood cells.

From Barron's • Apr. 10, 2026

It is not at all hard to believe that Melania would make a statement designed to salvage her own reputation, even if it simultaneously sells out her husband’s.

From Slate • Apr. 10, 2026

After setting aside their first few thousand dollars for emergencies, experts suggest that people start to simultaneously save for retirement as they finish building up their emergency fund.

From MarketWatch • Apr. 9, 2026

Have children clap and say the words simultaneously.

From "Music and the Child" by Natalie Sarrazin

Related Words

• together