n. [⟨ collective + -ist; = French collectiviste.] A believer in the principle of collectivism; especially, one who holds that the materials of production, as the soil, should belong to the people at large.Believing in the principle of collectivism.Pertaining to or of the nature of collectivism; founded on the principle of collectivism.Relating or belonging to the collectivists: as, a collectivist writer.