Main Entry: dem·on·stra·tion

Pronunciation: \ˌde-mən-ˈstrā-shən\

Function: noun

Date: 14th century

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 \-shnəl, -shə-n^əl\ adjective