"One person, one vote" or "one man, one vote" means legislative districts need to be divided according to population, so that each person (and each interest) has an equal amount of representation in government.
Diksha Verma answered this
it means every individual has right to vote
one person --- one vote
to authority one value
Deepan answered this
One person one vote means that evrryone in the country irrespecive of the caste , gender and income earned is allowed to vote for his own representative and his vote is also considered important though the whole nation doesnot vote evrytime !