What does "defraud" mean?

Native speaker’s answer
Rebecca
To defraud someone means to illegally obtain money from them by deception, like through scams. The speaker here is mentioning that he too was scammed. Ex: The elderly man was defrauded of $10,000 by a fake Nigerian prince. Ex: In recent years, many retirees have been defrauded of their money by online scammers.