blacklist

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A list of persons or organizations that have incurred disapproval or suspicion or are to be boycotted or otherwise penalized.
• transitive verb To place on or as if on a blacklist.

from The Century Dictionary.

• noun A list of defaulters: specifically applied to printed lists of insolvents and bankrupts, published officially.
• noun 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.
• noun Nautical, a list kept on board a man-of-war of delinquents to whom extra duty is assigned as a punishment.
• To place on a black-list.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A list or collection of people or entities to be shunned or banned.
• verb transitive To place on a blacklist; to mark a person or entity as one to be shunned or banned.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a list of people who are out of favor
• verb put on a blacklist so as to banish or cause to be boycotted