Folks,
Don't like your definitions of V1 much, mostly they reflect misinformation/misconception/misunderstanding that is all too common.
Boeing, derived from the certification standards of FAR 25 etc., and various FAA flight test guides in the last 30 or so years.
V1 --- the speed at which the takeoff must be continued, if the stopping has not already been commenced.
There is no decision at V1, it is go.
The decision to stop, and the initial actions to stop must be before V1.
Before you start ripping into me, I suggest you do your very basic homework, because too many company manuals fit the "misinformation/misconception/misunderstanding that is all too common."
So do the investigations of a number of not so successful rejected takeoffs.
Tootle pip!!
PS: Airbus words (not operator interpretation of) may seem a bit different, but the result is the same.