both bitter and sweet to the taste: bittersweet chocolate.
both pleasant and painful or regretful: a bittersweet memory.
—n.
Also calleda climbing or trailing plant, Solanum dulcamara, of the nightshade family, having small, violet, star-shaped flowers with a protruding yellow center and scarlet berries.
Also calledany climbing plant of the genus Celastrus, bearing orange capsules opening to expose red-coated seeds, esp. C. scandens.
pleasure mingled with pain or regret: the bittersweet of parting.