MILLIONAIRE
millionaire
(noun) a person whose material wealth is valued at more than a million dollars
Source: WordNet® 3.1
Etymology
Noun
millionaire (plural millionaires)
(strictly) A person whose net worth is at or greater than one million units of the local currency, but less than two million.
(loosely) A person whose net worth is at or greater than one million units of the local currency; a multimillionaire.
Source: Wiktionary
Mil`lion*aire", n. Etym: [F. millionnaire.]
Definition: One whose wealth is counted by millions of francs, dollars, or
pounds; a very rich person; a person worth a million or more.
[Written also millionnaire.]
Source: Webster’s Unabridged Dictionary 1913 Edition