blacklist

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A list of persons or organizations that have incurred disapproval or suspicion or are to be boycotted or otherwise penalized.
2. v. To place on or as if on a blacklist. See Synonyms at blackball.

Century Dictionary and Cyclopedia

1. n. A list of defaulters: specifically applied to printed lists of insolvents and bankrupts, published officially. Private lists, however, of a more searching character, are furnished by certain societies and private individuals to subscribers, with the view of affording protection against bad debts, frauds, etc.
2. n. Any list of persons who are for any reason deemed objectionable by the makers or users of the list, as for political or social misconduct, for joining in or assisting a Strike, etc.
3. n. Nautical, a list kept on board a man-of-war of delinquents to whom extra duty is assigned as a punishment.
4. To place on a black-list.

Wiktionary

1. n. A list or collection of people or entities to be shunned or banned.
2. v. transitive To place on a blacklist; to mark a person or entity as one to be shunned or banned.

GNU Webster's 1913

1. adj. a list of persons who are for some reason thought deserving of censure or punishment; -- esp. a list of persons stigmatized as insolvent or untrustworthy, made for the protection of tradesmen or employers. See Blacklist, v. t.
2. v. 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. See Black list, under black, a.

WordNet 3.0

1. n. a list of people who are out of favor
2. v. put on a blacklist so as to banish or cause to be boycotted