A millionaire is a person who has a net worth of at least one million units of currency, such as dollars, euros, or rupees. While being a millionaire is often associated with financial success and wealth, it is not necessarily an indicator of happiness or fulfillment in life. Many millionaires work hard, take calculated risks, and make smart financial decisions to achieve their wealth, but it is also possible to inherit wealth or make it through less scrupulous means. Regardless of how one becomes a millionaire, it is important to use wealth responsibly and give back to society through philanthropy or other means.