noun
Usage: often capitalized I&C
Etymology: translation of German eiserner vorhang iron fireproof theatrical curtain
1. : a political, military, and ideological barrier that cuts off and isolates an area (as of Soviet-controlled territory) preventing free communication and contact with differently oriented areas
2.
a. : an intangible barrier against communication of information or ideas ; especially : one that is set up for concealment and bars any opportunity for penetration
b. : a bar to the crossing of a mental or cultural borderline