IPA: /ˌmɪl.jəˈnɛr/
KK: /ˈmɪljəˌnɛr/
A person who has a lot of money, specifically at least one million dollars or its equivalent in other currencies.
After years of hard work, she finally became a millionaire.
Millionaire → It is formed from "million" (from Middle French *million*, meaning a thousand thousands) and "-aire" (from Latin *-arius*, meaning relating to or connected with). A millionaire is someone who is connected with or possesses a million units of currency.
Think of a 'million' as a thousand thousands, and the '-aire' means someone who is connected to that amount. This helps you remember that a millionaire is a person who has a million.