someone who has more than a billion dollars or pounds 亿万富翁
Examples from the Corpus
billionaire• Hauser is a billionaire several times over.• He was then faced during the presidentialelectioncampaign with an unexpectedchallenge by Ross Perot, a billionaire from Texas.• Perot, a billionaire, spent more than $ 60 million of his own money in his 1992 campaign.• Anthony Hopkins plays a bookishbillionaire with a head full of unusedfacts.• Then billionaire Ross Perot hinted he may rejoin the presidential race as an independent.