'idolatry' originates from the Greek word 'eidololatreia', where 'eidolon' meant 'idol' and 'latreia' meant 'worship'.

'eidololatreia' transformed into the Latin word 'idolatria', and eventually became the modern English word 'idolatry'.

Initially, it meant 'worship of idols', and this meaning has largely remained the same in modern usage.