1. (noun)presentation, presentment, demonstration a show or display; the act of presenting something to sight or view "the presentation of new data"; "he gave the customer a demonstration"
2. (noun)demonstration a show of militaryforce or preparedness "he confused the enemy with feints and demonstrations"
3. (noun)demonstration, manifestation a publicdisplay of groupfeelings (usually of a political nature)
"there were violent demonstrations against the war"
5. (noun)demonstration, demo a visual presentationshowing how something works "the lecture was accompanied by dramatic demonstrations"; "the lecturer shot off a pistol as a demonstration of the startle response"