I am with compressor stall, a person in the industry will have a good idea of the definitions (as we can see they vary!) the general public with some interest need only a basic definition - direct them to any FAA, Boeing or other definition web page but keep it simple.
V1 - the maximum speed during a take-off event that a take-off should be aborted, in the event of a malfunction or unforseen event. To continue a take-off after this speed would bring the aircraft to a stop beyond the end of the runway.
Vr - is the speed pitch input is given to become airborne.
V2 - the minimum target speed for controlled flight during a take-off event.
** Who at a speed 5 knots above V1 and then hitting a flock of birds that completely and instantly removes all vision on all windows except co-pilot side window will continue on to Vr and V2 speeds if there is 5 km clearing after runway finishes?
Me, I will apply brakes even after rotation(Vr) if 5km of flat cleared dirt lays in front of me.