To put in a black list as deserving of suspicion, censure, or punishment; esp. to put in a list of persons stigmatized as insolvent or untrustworthy, -- as tradesmen and employers do for mutual protection; as, to blacklist a workman who has been discharged. See Black list, under Black,
- A list of persons or organizations that have incurred disapproval or suspicion or are to be boycotted or otherwise penalized.
- To place on or as if on a blacklist. See Synonyms at blackball.