(strictly) A person whose net worth is at or greater than one million units of the local currency, but less than two million.
Somebody whose wealth is greater than one billion (109) dollars, or other currency.
(loosely) A person whose net worth is at or greater than one million units of the local currency; a multimillionaire.
a very rich person whose material wealth is valued at more than a billion dollars
One whose wealth is counted by millions of francs, dollars, or pounds; a very rich person; a person worth a million or more.
A billionaire is a person with a net worth of at least one billion (1,000,000,000, i.e., a thousand million) units of a given currency, usually of a major currency such as the United States dollar, the euro, or the British pound. The American business magazine Forbes produces a global list of known U.S. dollar billionaires every year and updates an Internet version of this list in real time.
a person whose material wealth is valued at more than a million dollars
A millionaire is an individual whose net worth or wealth is equal to or exceeds one million units of currency. Depending on the currency, a certain level of prestige is associated with being a millionaire.