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

Cook “are almost comically irreconcilable as a matter of logic,” argues Mark in a piece that explains how the justices simultaneously expanded executive power while insulating the one agency it appears to truly value.

From Slate • Jul. 2, 2026

The judge called Alberto, who missed work to attend the hearing, along with three other cases simultaneously, and spent only minutes on each.

From Los Angeles Times • Jul. 1, 2026

Baltussen says that in addition to following any of these stock-picking strategies in isolation, it also makes sense to apply them simultaneously, favoring stocks that score high across all three dimensions.

From Barron's • Jun. 30, 2026

There were, for example, three British players in the top 50 of the women's rankings simultaneously for the first time since 1986.

From BBC • Jun. 30, 2026

While they are performing their pattern, they are simultaneously listening and memorizing the new pattern.

From "Music and the Child" by Natalie Sarrazin

Related Words

• together