selfist noun 2adjective 1forms 1 noun2 •A selfish person. •A proponent of selfism; One who believes in their right and their responsibility to look after their own needs and desires.The selfist, on the other hand, believes that those same persons wield power to their own advantage only, and care little or not at all about the aspirations of their constituents. — 2015 adjective1 •Believing in or practicing selfism.To do this, you should have sympathy for all humanity, and this cannot be done as long as you are a selfish or even selfist person. — 2012 formsselfists