2 uses
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Definition
at the same time
- Dramatic music—five or six different tracks—blared simultaneously from the speakers.p. 205.6
- But unless you had a team fighting simultaneously on the Tartarus side, a team powerful enough to defeat a legion of monsters in their home territory—p. 539.5
There are no more uses of "simultaneous" in The Mark of Athena.
Typical Usage
(best examples)