And what about a definition of mass?

I already gave it to you.
Radi to Waite 201418
Dear Waite, I have read all you wrote, and I cut our texts to shorten
our messages.
Please, repeat your definition of mass.
Do you agree with the Wheeler definition: To find out the mass of a
particle one must weight it! Or determine its gravitational pull?
And, please, explain what occurs when a constant force accelerates a
body: is the accelerate constant? is the velocity constant?