ghettoization

noun
  1. the process of confining or isolating a group of people (especially a racial, ethnic, or religious minority) to a specific area or district, often characterized by poor conditions and limited opportunities
  2. Usage: often used in historical contexts referring to forced segregation; can also refer to modern social or economic segregation
  3. the process of restricting or limiting something (such as a cultural group, idea, or market) to a narrow or marginalized space
  4. Usage: figurative or extended use

Examples