Pronunciation: (när-sis'us),[key] —n., —pl.-cis•sus, -cis•sus•es, -cis•siPronunciation: (-sis'ē, -sis'ī)[key]for 1, 2. 1. any bulbous plant belonging to the genus Narcissus, of the amaryllis family, having showy yellow or white flowers with a cup-shaped corona.
2. the flower of any of these plants.
3. (cap.) Class. Myth.a youth who fell in love with his own image reflected in a pool and wasted away from unsatisfied desire, whereupon he was transformed into the flower.