a rich or wealthy person; someone who has a lot of money or assets.
彼は若い頃から努力してお金持ちになった。
He became wealthy through hard work since his youth.
お金持ちの家に招かれてごちそうになった。
I was invited to a wealthy person's house and treated to a meal.
お金持ちになるのは簡単ではない。
Becoming rich is not easy.