Iron curtain and Off limits

Iron curtain noun - An impenetrable barrier to communication or information especially as imposed by rigid censorship and secrecy; used by Winston Churchill in 1946 to describe the demarcation between democratic and communist countries.

Off limits and iron curtain are semantically related. In some cases you can use "Off limits" instead a noun phrase "Iron curtain".

Iron curtain and off limits are semantically related. Sometimes you can use "Iron curtain" instead a noun phrase "Off limits".