From Longman Dictionary of Contemporary Englishmillionairemil‧lion‧aire /ˌmɪljəˈneə $ -ˈner/●くろまる●くろまる○しろまる noun [countable]RICHsomeone who is very rich and has at least a million pounds or dollarsan American millionairea millionaire businessmanExamples from the Corpusmillionaire• At least 52 millionaires will be created each year by the 1ドル-a-go NationalLotteryunveiledyesterday.• The Secretary of State is a millionaire.• This person would become suspicious of others fearing that friendship was only based on the fact that I am now a millionaire.• The money to keep the hospital open was provided by a Londonmillionaire.• Simpson did not appear in court, but his lawyersargued that their client is no millionaire.• I can't afford a new car just now. I'm no millionaire, you know.• Opponentsclaim the millionairepublisher is trying to buy votes with his fatcheckbook.From Longman Business Dictionarymillionairemil‧lion‧aire /ˌmɪljəˈneə-ˈner/ noun [countable]someone who has assetsworth at least a million pounds, dollars etcExecutives at the TV company can expect to become millionaires through a 15% holding.a dollar millionaire →paper millionaireOriginmillionaire(1800-1900)Frenchmillion; → MILLION