DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   demonstration
       n 1: a show or display; the act of presenting something to sight
            or view; "the presentation of new data"; "he gave the
            customer a demonstration" [syn: presentation,
            presentment, demonstration]
       2: a show of military force or preparedness; "he confused the
          enemy with feints and demonstrations"
       3: a public display of group feelings (usually of a political
          nature); "there were violent demonstrations against the war"
          [syn: demonstration, manifestation]
       4: proof by a process of argument or a series of proposition
          proving an asserted conclusion [syn: demonstration,
          monstrance]
       5: a visual presentation showing how something works; "the
          lecture was accompanied by dramatic demonstrations"; "the
          lecturer shot off a pistol as a demonstration of the startle
          response" [syn: demonstration, demo]