Sweet and then bitter or bitter and then sweet; esp. sweet with a bitter after taste; hence (Fig.), pleasant but painful.
Anything which is bittersweet.
A kind of apple so called.
A climbing shrub, with oval coral-red berries (Solanum dulcamara); woody nightshade. The whole plant is poisonous, and has a taste at first sweetish and then bitter. The branches are the officinal dulcamara.
An American woody climber (Celastrus scandens), whose yellow capsules open late in autumn, and disclose the red aril which covers the seeds; -- also called Roxbury waxwork.
It was as if all of the happiness, all of the magic of this blissful hour had flowed together into these stirring, bittersweet tones and flowed away, becoming temporal and transitory once more. Herman Hesse
I feel extremely lucky, extremely grateful, and a little bittersweet, too. Wentworth Miller
There's always a bittersweet kind of thing, but I feel like everything had to work out the way it is. Everything that had to happen, happened. Bruno Mars