'junction' originates from Latin, specifically the word 'junctio' (from the past participle 'junctus') of 'jungere' (classical form 'iungere'), where 'jungere/iungere' meant 'to join'.

'junction' changed from Old French 'jonction' (from Latin 'junctio'), passed into Middle English as 'jonccioun'/'jonction', and eventually became the modern English 'junction'.

Initially, it meant 'the act of joining' or 'a joining', but over time it evolved into its current primary sense of 'a place or point where things are joined', especially roads or connections.