lex loci Syllabification: (lex lo·ci)Pronunciation: /ˈleks ˈlōsī, -ˌsē, -ˌkē, -ˌkī/Definition of lex loci noun Law the law of the country in which a transaction is performed, a tort is committed, or a property is situated. Origin:Latin, 'law of the place'lex loci in other Oxford dictionaries Definition of lex loci in the British & World English dictionary