Simultaneous Definition

sīməl-tānē-əs, sĭməl-
adjective
Occurring, done, existing, etc. together or at the same time.
Webster's New World
Containing variables for which there are values that can satisfy all the equations.
Simultaneous equations.
American Heritage

Origin of Simultaneous

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

    From Wiktionary

  • Latin simul at the same time sem-1 in Indo-European roots English -taneous (as in instantaneous)

    From American Heritage Dictionary of the English Language, 5th Edition

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