Simultaneity

//ˌsaɪməltəˈniɪti// noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    The quality or state of being simultaneous; simultaneousness. countable, uncountable
  2. 2
    happening or existing or done at the same time wordnet
  3. 3
    More than one complete musical texture occurring at the same time. This first appeared in the music of Charles Ives, and is common in the music of Conlon Nancarrow, and others. countable, uncountable

Synonyms

All synonyms
simultaneousnessaccompanimentaccordanceagreementallianceassociation

Example

More examples

"If four space-points, which do not lie in one plane, are conceived to be at the same time t₀, then it is no longer permissible to make a change of the time parameter by a Lorentz-transformation, without at the same time destroying the character of the simultaneity of these four space points."

Etymology

From simultane(ous) + -ity. By surface analysis, simult(aneous) + -aneity. Compare French simultanéité.

Related phrases

pitch simultaneity

More for "simultaneity"

SynonymsSentencesPronunciationTranslate

Next best steps

Find stronger synonymsSee usage examplesCheck pronunciationBrowse writing guides

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.