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.
Although the Berlin wall was a very significant representation of the Iron Curtain, no one border or wall was the Iron Curtain. Winston Churchill used the term Iron Curtain in his famous speech on March 5 1946, at Westminister College. He came up with this term to describe the division of Europe.