in music what does p m.v.,or just m.v. mean?

Question

This is possibly only a piano [as instrument] marking Please help, I need this as a performer. I don't have it in any of my music dictionary.

Answer 1

MV - is likely Mezza Voce - with subdued or moderated volume, P usually is piano so, perhaps piano subdued or moderated volume. But piano can also indicated softer too.
I've never seen P.M.V. either. maybe if you looked up the music that it is indicated that will help you out.