n. [ It. ] A quarter of a city where Jews live in greatest numbers. [ Webster 1913 Suppl. ]

I went to the Ghetto, where the Jews dwell. Evelyn. [ Webster 1913 Suppl. ]

2. By extension: Any section of a town inhabited predominantly by members of a specific ethnic, national or racial group, such segregation usually arising from social or economic pressure. The term is commonly applied to areas in cities having a high concentration of low-income African-Americans. [ PJC ]

3. [ fig. ] Any isolated group of people. [ PJC ]

4. [ fig. ] Any group isolated by external pressures, with an implication of inferiority. [ PJC ]

n. [ from their popularity with negro inner-city (ghetto) youth ] A portable casette or compact disk player, usually having an integrated radio receiver. It typically has two (stereophonic) speakers, and can be adjusted to play at a high sound intensity, from which the name comes.
Syn. -- boom box. [ WordNet 1.5 ]

v. t. to form into a ghetto; to isolate (people) as though into a ghetto. [ PJC ]