The term “billionaires” connotes all those elements and persons who own money, property or other capital of the value of one or more billions in the reference currency. By extension, the term billionaires also refers to a very rich person. Another definition is something that earns billions, for example "I made a billionaire win". In Italy, with the introduction of the single currency, the term billionaire, understood as a person or thing, was replaced by the term milionario.
You will also be interested in:The 10 youngest billionaires in the world