The definition of a tutor is a personal teacher, a teaching assistant or someone who helps a student catch up in a subject. An example of a tutor is someone who teaches a teenage celebrity. An example of a tutor is a teacher who assists a college professor with their teaching duties.
iron curtain-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.
No, that was already in progress. The term was invented by Sir Winston Churchill, during a speech. It was a literal Iron Curtain, a metal fence placed between East and West. Sometimes with minefields and barbed wire or concrete walls. In other places just a high wire fence.