superfinePronunciation: /ˈsuːpəfʌɪn, suːpəˈfʌɪn, sjuː-/Definition of superfine adjective 1of especially high quality:superfine cotton shirtings 2(of fibres or an instrument) very thin:superfine tweezers consisting of especially small particles:superfine face powderOrigin: late 16th century (in the sense 'excessively elegant'): from super- 'to a high degree' + fine1superfine in other Oxford dictionaries Definition of superfine in the US English dictionary