millionaire
n.a person who has at least one million dollars, pounds, or euros. You use this to describe someone who is very rich.
n.a person whose assets or net worth are valued at one million units of currency or more. Often used to signify a high level of wealth and financial independence.
“He became a millionaire after selling his tech company.”
“The lottery winner woke up as a millionaire, but she promised to keep her job at the hospital.”
“While being a millionaire was once the ultimate symbol of opulence, inflation has shifted that perception toward the multi-millionaire or billionaire classes in many global financial hubs.”
From French millionnaire. By surface analysis, million + -aire.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.