'redefine' originates from the prefix 're-' meaning 'again' and the word 'define' from Latin 'definire', where 'de-' meant 'completely' and 'finire' meant 'to finish'.

'definire' transformed into the Old French word 'definir', and eventually became the modern English word 'define', with 're-' added to form 'redefine'.

Initially, it meant 'to set boundaries again', but over time it evolved into its current meaning of 'to define again or differently'.