1.NounA person whose wealth is at least one trillion (10) currency units.
"The CEO of our company is a multibillionaire and now hopes to become a trillionaire.; Countless Zimbabweans had the dubious distinction of being trillionaires in 2008."
2.NounOne who is therefore very wealthy, because those currency units are not hyperinflated.
"The CEO of our company is a multibillionaire and now hopes to become a trillionaire."
3.NounOne who is not wealthy (nor rare), because those currency units are hyperinflated.
"Countless Zimbabweans had the dubious distinction of being trillionaires in 2008."
4.NounSynonym of gazillionaire (“an incredibly rich person”).
"Who cares what that guy thinks? He may be a trillionaire, but he can’t buy good taste."