'alibi' originates from Latin, specifically the word 'alibī', where 'ali-' meant 'other' and 'ubi' meant 'where'.

'alibī' transformed into the English word 'alibi', and eventually became the modern English word 'alibiing' as a present participle.

Initially, it meant 'elsewhere', but over time it evolved into its current meaning of 'an excuse or defense'.