Millionairess (noun)

A female millionaire; a woman who has a net worth of one million or more.

Origin:

From the words "millionaire" meaning a person who has a lot of money and the suffix -ess indicating a female person.

Examples:

1. She was a self-made millionairess, having built her fortune from scratch.
2. The millionairess was known for her extravagant lifestyle.
3. She was the youngest millionairess in the country.
4. The millionairess donated a large sum of money to charity.
5. She was a successful businesswoman and a millionairess.