Definitions
1.nounAny of the poisonous plants belonging to the genus Solanum, especially black nightshade or woody nightshade.
2.nounAny plant of the wider Solanaceae family, including the nightshades as well as tomato, potato, eggplant, and deadly nightshade.
3.nounBelladonna or deadly nightshade, Atropa belladonna.
4.nounAny of several plants likened to nightshade, usually because of similar dark-colored berries.