Simultaneous meaning

sīməl-tānē-əs, sĭməl-
The definition of simultaneous is things that are going on at the same time.

When two television shows are on different channels at the same time, this is an example of a situation where the shows are simultaneous.

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Happening, existing, or done at the same time.
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(mathematics) Containing variables for which there are values that can satisfy all the equations.

Simultaneous equations.

adjective
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Occurring, done, existing, etc. together or at the same time.
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Occurring or transpiring at the same time.
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Origin of simultaneous

  • 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

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

    From Wiktionary