Question

what is meant by Mev​

Answer 1

million electron volts; megaelectron volt.

OR

In high-energy physics, the electronvolt is often used as a unit of momentum. A potential difference of 1 volt causes an electron to gain an amount of energy (i.e.,1 eV). This gives rise to usage of eV (and keV, MeV, GeV or TeV) as units of momentum, for the energy supplied results in acceleration of the particle

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Answer 2

mega electron volt which is a unit for calculating the energy of atomic substances. Generally the energy acquired by the electron when it's passes through a potential difference is called MEV.