1. lists of people or organizations that are disapproved of or banned from something

1. puts someone or something on a list of those who are disapproved of or banned

Examples

• The company maintains blacklists of unreliable suppliers.
• Several actors were placed on Hollywood blacklists during the 1950s.
• The security software uses blacklists to block malicious websites.
• The school blacklists students who violate the honor code.
• Many countries maintain blacklists of suspected terrorists.
• The email system automatically blacklists known spam addresses.
• Credit agencies keep blacklists of people with poor payment histories.