Simultaneously vs. Concurrently

Simultaneously and Concurrently Definitions
Simultaneously
Happening, existing, or done at the same time.
Concurrently
Happening, existing, or done at the same time as something else
Dealing with concurrent crises.
Simultaneously
(Mathematics) Containing variables for which there are values that can satisfy all the equations
Simultaneous equations.
Concurrently
Meeting or tending to meet at the same point; convergent
Concurrent lines.
Simultaneously
Occurring at the same time.
Concurrently
Being in accordance; harmonious
Are these decisions concurrent with university policy?.
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Simultaneously
At the same instant;
They spoke simultaneously
Concurrently
In a concurrent manner; at the same time
Concurrently
With concurrence; unitedly.
Concurrently
Overlapping in duration;
Concurrently with the conference an exhibition of things associated with Rutherford was held
Going to school and holding a job at the same time