'demonstration' originates from Latin, specifically the word 'demonstratio,' where 'de-' meant 'down from' and 'monstrare' meant 'to show.'

'demonstratio' transformed into the Old French word 'demonstracion,' and eventually became the modern English word 'demonstration' through Middle English.

Initially, it meant 'to show or point out,' but over time it evolved into its current meanings of 'an act of showing' and 'a public protest.'