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Simultaneous vs. Contemporaneous: What's the Difference?

Simultaneous and Contemporaneous Definitions

Simultaneous

Happening, existing, or done at the same time.

Contemporaneous

Originating, existing, or happening during the same period of time
The contemporaneous reigns of two monarchs.

Simultaneous

(Mathematics) Containing variables for which there are values that can satisfy all the equations
Simultaneous equations.

Contemporaneous

Existing or created in the same period of time.
Look in other contemporaneous works to see whether that idea was common then.

Simultaneous

Happening at the same moment.
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Contemporaneous

Living, existing, or occurring at the same time; contemporary.
The great age of Jewish philosophy, that of Aben Esra, Maimonides, and Kimchi, had been contemporaneous with the later Spanish school of Arabic philosophy.

Simultaneous

To be solved for the same values of variables.

Contemporaneous

Occurring in the same period of time;
A rise in interest rates is often contemporaneous with an increase in inflation
The composer Salieri was contemporary with Mozart

Simultaneous

Existing, happening, or done, at the same time; as, simultaneous events.

Contemporaneous

Of the same period
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Simultaneous

Occurring or operating at the same time;
A series of coincident events

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