WordReference Random House Unabridged Dictionary of American English © 2026
as•sim•i•la•tion•ism
(ə sim′ə lā′shə niz′əm),USA pronunciation n.
as•sim′i•la′tion•ist, n., adj.
- Sociologythe practice or policy of assimilating or encouraging the assimilation of people from all races and cultures:The family at first resisted the assimilationism of the New World.
- assimilation + -ism 1950–55