demonstration

Proof by a process of argument or a series of proposition proving an asserted conclusion.

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”

A show or display; the act of presenting something to sight or view.

“he gave the customer a demonstration”

A public display of group feelings (usually of a political nature).

“there were violent demonstrations against the war”

A show of military force or preparedness.

“he confused the enemy with feints and demonstrations”