'expedition' originates from Latin, specifically the word 'expeditio,' where 'ex-' meant 'out' and 'ped-' meant 'foot.'

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

Initially, it meant 'a setting out or a military campaign,' but over time it evolved into its current meaning of 'a journey with a specific purpose.'