'projection' originates from Latin, specifically the word 'proiectio,' where 'pro-' meant 'forward' and 'iacere' meant 'to throw.'

'proiectio' transformed into the Old French word 'projection,' and eventually became the modern English word 'projection' through Middle English.

Initially, it meant 'the action of throwing forward,' but over time it evolved into its current meanings related to estimation, display, and extension.