Question

what is the meaning of trillionaire

Answer 1

Somebody whose wealth is greater than one trillion (10to the power 12) dollars, or other currency is called trillionaire

Answer 2

A person who have trillions of money.
100 crores -- 1 billion.
So far no one is trillionaire.
1000 crores -- 1 trillion.

World richest man is Jeff Bezos founder of Amazon who is also a billionaire only.