patchouli Syllabification: (patch·ou·li)Pronunciation: /pəˈCHo͞olē/Definition of patchouli noun 1an aromatic oil obtained from a Southeast Asian shrub and used in perfumery, insecticides, and medicine. 2the strongly scented shrub of the mint family from which this oil is obtained. Pogostemon cablin, family Labiatae Origin: mid 19th century: from Tamilpatchouli in other Oxford dictionaries Definition of patchouli in the British & World English dictionary