What is a majority?

Answer 1

It means more than half of the original number.
A majority is more than half. ( A plurality is the choice with the most votes, which can be less than half if there are more than two choices. )

it means most of

Answer 2

A major is a point of study. If you are majoring in Communications, then your classes focus on that subject and your degree will say Bachelors Degree of Communications.