out migration
/ˈaʊtmaɪˌɡreɪʃən/
noun
- The movement of people away from a particular area, region, or country to live elsewhere.
- The out-migration from rural villages to cities has increased dramatically over the past decade.
- Economic hardship led to a wave of out-migration from the island nation.
- The government is studying the causes of out-migration among young professionals.
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