Why is the ninth month called September?
also black-list, black list, "list of persons who have incurred suspicion," 1610s, from black (adj.), here indicative of disgrace, censure, punishment (attested from 1590s, in black book) + list (n.). Specifically of employers' list of workers considered troublesome (usually for union activity) is from 1888. As a verb, from 1718. Related: Blacklisted; blacklisting.
Concerted action by employers to deny employment to someone suspected of unacceptable opinions or behavior. For example, individual workers suspected of favoring labor unions have often been blacklisted by all the employers in a region.
To punish someone by denial of work, boycotting of products, etc •Both terms come fr the 1700s and meant ''to ostracize''; the modern specialized sense appears to have developed in the labor troubles of the 1890s: Some members of the Twilight Zone movie crew say they are being blackballed
A list of banned or undesirable people: the blacklist for the eventverb
To put someone's name on a list of the banned or undesirable: blacklisted during collegeRelated Terms