'illuminator' originates from Latin, specifically the word 'illuminare,' where 'in-' meant 'into' and 'luminare' meant 'to light up.'

'illuminare' transformed into the Old French word 'illuminer,' and eventually became the modern English word 'illuminator' through Middle English.

Initially, it meant 'to light up or make bright,' and this meaning has largely remained the same in modern usage.