Exhibiting or indicating with clearness: as, a demonstrative figure in painting.In rhetoric, expressing or explaining with clearness, force, and beauty.Characterized by or given to the strong exhibition of any feeling or quality; energetically expressive: as, a demonstrative manner; a demonstrative person.Pertaining to or of the nature of proof; having the power of proving or demonstrating; indubitably conclusive: as, a demonstrative argument; demonstrative reasoning.n. A demonstrative pronoun.