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Added 2 October 2026

simultaneous

/ˌsɪm.əlˈteɪ̯.ni.əs/ adjective

In Latin: contemporāneus, simultāneus Wiktionary

adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about simultaneous at Wordnik → Where our words come from →

Happening at the same moment.
To be solved for the same values of variables.

Origin

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

From Wiktionary, via Kaikki.org (CC BY-SA)

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