Noun
(public health) A barrier (physical or administrative) to prevent the spread of disease.
(by extension) Any barrier to the spread of anything deemed undesirable.
Source: en.wiktionary.org; cordon sanitaire : a policy of containment directed against a hostile entity or ideology; a chain of buffer states ; lit. "quarantine line". ; corniche : a road that clings like a ledge to the side of a cliff or mountain. Source: Internet
He ended the cordon sanitaire of the PCF which the party had been subject to since 1947. Source: Internet
Legacy Other parties erected a cordon sanitaire around Janmaat, ignoring him while he spoke in parliament. Source: Internet
Starting in 1919, the French sought to create a cordon sanitaire that would keep both Germany and the Soviet Union out of Eastern Europe. Source: Internet