Also means
run as double (train)
Usage Note
Dédoubler means to split something into two parts: dédoubler une classe (to split a class in two, forming two groups). In railway vocabulary, dédoubler un train means to run a duplicate train to handle extra passengers. Se dédoubler figuratively means to do two things at once, as in je ne peux pas me dédoubler (I can't be in two places at once).
Examples
"On a dédoublé la classe pour les examens."
Natural Translation
The class was split in two for the exams.
Literal Translation
One has split the class for the exams.

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