to be completely deceived by someone who lies to you
Don’t be taken in by products claiming to help you lose weight in a week.
She was taken in by the scam artist's convincing story and ended up losing a significant amount of money in a fraudulent investment scheme.
The clever sales pitch took in many unsuspecting customers, who later realized they had been taken in by false promises.
He was initially taken in by her charming demeanor, only to discover later that she had been deceitful and untrustworthy in their relationship.
