What is "arguendo"

"in the course of argument," 1817, courtroom Latin, from Medieval Latin ablative of arguendum, gerundive of arguere "to argue" (see argue).

adv. 1 (context legal English) for the sake of argument 2 (context legal English) (non-gloss definition: Used to set off the facts presented in an argument on a point of law from facts in dispute in the case.)

Arguendo is a Latin legal term meaning for the sake of argument. "Assuming, arguendo, that ..." and similar phrases are used in courtroom settings and academic legal settings, and occasionally in other domains, to designate provisional and unendorsed assumptions that will be made at the beginning of an argument in order to explore their implications.