1A guarded line preventing anyone from leaving an area infected by a disease and thus spreading it.
- ‘The village agreed to establish a cordon sanitaire around it that nobody was to cross for any reason until the disease had burned itself out.’
- ‘Why not destroy the cattle exhibiting the symptoms and produce a cordon sanitaire by vaccinating the sheep, whether they present the symptoms or not?’
- 1.1A measure designed to prevent communication or the spread of undesirable influences.‘these rules help to reinforce the cordon sanitaire around the Pentagon’
- ‘The bottom line: a cordon sanitaire between local law enforcement and immigration authorities that creates a safe haven for illegal criminals.’
- 1.2A series or chain of small neutral buffer states around a larger, potentially dangerous or hostile state.
Mid 19th century: French, from cordon line, border (see cordon) + sanitaire sanitary.