blacklist /ˈblæklɪst/noun 1verb 1forms 3 noun1 •A list or set of people or entities to be shunned or banned, disallowed or blocked.The software included a lengthy blacklist of disreputable websites to block. verb1 •To place on a blacklist; to mark a person or entity as one to be shunned or banned.You can blacklist known spammers with that button.She blacklisted me from her dorm party since I yakked on her couch last time. formsblacklisted · blacklisting · blacklists