1. a person who has an extremely large amount of money
Usage: informal

Examples

• The tech entrepreneur became a zillionaire after his company went public.
• She joked that she would be a zillionaire if she had a dollar for every time someone asked that question.
• The lottery winner felt like a zillionaire with his massive jackpot.
• Many zillionaires donate large portions of their wealth to charity.
• He dreamed of becoming a zillionaire through his startup idea.
• The oil tycoon was considered a zillionaire by industry standards.