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

If even 10% of the roughly 24,000 eligible agencies enter the procurement cycle in the first implementation period, that is 2,400 new contracts entering the market simultaneously.

From MarketWatch • Apr. 13, 2026

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

You were simultaneously anxious for them, and unable to look away.

From "We'll Fly Away" by Bryan Bliss

Related Words

• together