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.
In a tall building of steel-frame construction, an exterior wall that is non-load-bearing, having no structural function; also see metal curtain wall. 2. In ancient fortifications, an enclosing wall or rampart connecting two bastions or towers.