The word demonstration has numerous meanings

• A protest march is often referred to as a demonstration.
• A military demonstration is the show of armed forces and their capabilities, often in maneuvers, to impress a potential enemy. It can be used either to provoke that enemy into opening an armed conflict, or to scare him away from one.
• A demonstration is a way of teaching, for example, by performing a certain action, so others can see and learn it.
• A demonstration is a conclusive proof.
• For music or software demonstrations, see demo.