/ Dictionary / Index A assimilationism: Meaning and Definition of Find definitions for: as•sim•i•la•tion•ism Pronunciation: (u-sim"u-lā'shu-niz"um), [key] — n. the 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. assimilation assimilative Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language