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Synonyms

simultaneity

American  
[sahy-muhl-tuh-nee-i-tee, sim-uhl-, -ney-] / ˌsaɪ məl təˈni ɪ ti, ˌsɪm əl-, -ˈneɪ- /
Sometimes simultaneousness

noun

  1. the state or quality of existing, occurring, or operating at the same time.

    The simultaneity of the two events was established by checking timestamps on recordings.


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.

In the meantime, we need realistic strategies for coping with simultaneity.

From The Wall Street Journal • Mar. 6, 2026

The simultaneity of the play’s two levels gets lost in the comic mayhem of Act Two.

From Los Angeles Times • Feb. 10, 2025

The crowd’s response to this minor miracle of electronic simultaneity is high-spirited and good-natured.

From Washington Post • Apr. 6, 2023

We tag along for a visit to a genteel gallery opening in St. Gallen, Switzerland, but what sticks in the mind is Motherwell’s self-aware observations about the simultaneity of art movements.

From New York Times • Jun. 16, 2022

Like the proof of the irrationality of V2, like the discussion of simultaneity in special relativity, this is an argument in which the premise is challenged because the conclusion seems absurd.

From "Cosmos" by Carl Sagan