'in-migration' definitions:

Definition of 'in-migration'

(from WordNet)
noun
Migration into a place (especially migration to a country of which you are not a native in order to settle there) [syn: immigration, in-migration]

Definition of 'in-migration'

From: GCIDE
  • in-migration \in-migration\ n. migration into a place.
  • Syn: immigration. [WordNet 1.5]