aromatherapyPronunciation: /ərəʊməˈθɛrəpi/Translate aromatherapy | into French | into German | into Italian Definition of aromatherapy noun [mass noun] the use of aromatic plant extracts and essential oils for healing and cosmetic purposes. Derivatives aromatherapeuticPronunciation: /-ˈpjuːtɪk/ adjective aromatherapist noun aromatherapy in other Oxford dictionaries Definition of aromatherapy in the US English dictionary