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.
The Iron Curtain took physical shape in the form of border defenses between the countries of western and eastern Europe. These were some of the most heavily militarised areas in the world, particularly the so-called  inner German border  â commonly known as die Grenze in German â between East and West Germany.