ghetto

1. An (often walled) area of a city in which Jews are concentrated by force and law. (Used particularly of areas in medieval Italy and in Nazi-controlled Europe.)
2. An (often impoverished) area of a city inhabited predominantly by members of a specific nationality, ethnicity or race.
3. An area in which people who are distinguished by sharing something other than ethnicity concentrate or are concentrated.
4. (sometimes derogatory) An isolated, self-contained, segregated subsection, area or field of interest; often of minority or specialist interest.

verb

To confine (a specified group of people) to a ghetto.

1. Of or relating to a ghetto or to ghettos in general.
2. Unseemly and indecorous or of low quality; cheap; shabby, crude.
3. Characteristic of the style, speech, or behavior of residents of a predominantly black or other ghetto in the United States.
4. Having been raised in a ghetto in the United States.