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 other countries to the west of the Iron Curtain had democratic governments. The term Iron Curtain was coined by German politician Lutz Graf Schwerin von Krosigk, and made popular by Winston Churchill, who first used it in a public speech in March of 1946.