wall off
verb1
To separate with a wall.
- The previous owners had walled off two rooms, making an apartment.
2
Broadly, Figuratively To isolate completely.
- Early protectionists tried to wall off the country from foreign trade.
- Nationalist politics, walled off for decades by an artificial silence, have emerged practically unscathed from the ruins of Communism's enforced internationalism.1990 November 12, Celestine Bohlen, “Ethnic Rivalries Revive in East Europe”, in The New York Times, section A, page 1: