extremely light or thin; made of extremely small pieces 极轻的；极细的 superfine fibres 微细的纤维 superfine powder 超细粉末
of extremely good quality 质量极高的；特级的 superfine cloth 特级布料
Word Originlate 16th cent. (in the sense ‘excessively elegant’): from super- ‘to a high degree’ + the adjective fine.