[dem.on.stra.tion] n (14c) 1: an act, process, or means of demonstrating to the intelligence: as a (1): conclusive evidence: proof (2): derivation
5. b: a showing of the merits of a product or service to a prospective consumer
2: an outward expression or display
3: a show of armed force
4: a public display of group feelings toward a person or cause -- dem.on.stra.tion.al adj