“黑名单”是指因某种原因而不受某国欢迎，而被拒绝在某一时间内或永久禁止入境的外国人名录。这些人申请该国签证往往会被拒签，甚至被永久拒签。
“Blacklist” refers to a list of foreigners who are not welcomed by a country for some reason and are denied entry at a certain time or permanently prohibited. These people tend to be denied visas for the country or even permanently.