genius loci Syllabification: (ge·ni·us lo·ci)Pronunciation: /ˈjēnēəs ˈlōsī, -kī/Definition of genius loci noun [in singular] the prevailing character or atmosphere of a place. the presiding god or spirit of a place. Origin: early 17th century: Latin, literally 'spirit of the place'genius loci in other Oxford dictionaries Definition of genius loci in the British & World English dictionary