Simultaneous

//ˌsaɪ̯.məlˈteɪ̯.ni.əs// adj

adj ·Uncommon ·College level

Definitions

Adjective
  1. 1
    Happening at the same moment. not-comparable

    "As with the Lejeuneaceae, this pattern of massive speciation appears to be correlated with the Cretaceous explosion of the angiosperms and the simultaneous creation of a host of new microenvironments, differing in humidity, light intensity, texture, etc."

  2. 2
    To be solved for the same values of variables. not-comparable
Adjective
  1. 1
    occurring or operating at the same time wordnet

Synonyms

All synonyms
accessoryaccompanyingagreeingassociatedat onceattendant

Example

More examples

"The boy solved the simultaneous equation with ease."

Etymology

From Medieval Latin simultaneus, from simultim (“at the same time, extended”), from Latin simul (“together, at the same time”); compare similar.

Related phrases

simultaneous deathsimultaneous equationssimultaneous interpretationsimultaneous interpreting

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