'non-domestic' originates from the prefix 'non-' meaning 'not' and the word 'domestic' from Latin 'domesticus', where 'domus' meant 'house'.

'domesticus' transformed into the Old French word 'domestique', and eventually became the modern English word 'domestic'.

Initially, 'domestic' meant 'pertaining to the house', but 'non-domestic' evolved to mean 'not related to the home'.