noun
millionaire
mil-yuh-NAIR/ˌmɪljəˈner/
A person whose net worth is at least one million units of a currency.
The retired owner is now a millionaire.

Etymology
The ending turns million from a number into a label for a person. The association is specifically financial: someone whose wealth reaches a million units of currency.
In context
the CEO he went from probably a millionaire he's probably had like one million
More examples
- Several millionaires invested in the company.
- He became a millionaire after selling his shares.
- The article compared the habits of new millionaires.
Forms
millionaire · millionaires
Similar words
- wealthy person
- A broader description without a precise financial threshold.