'contiguity' originates from Latin, specifically the word 'contiguus,' where 'con-' meant 'together' and 'tangere' meant 'to touch.'

'contiguus' transformed into the French word 'contiguïté,' and eventually became the modern English word 'contiguity' through Middle English.

Initially, it meant 'touching or in contact,' but over time it evolved into its current meaning of 'being in direct contact or proximity.'