Noun deadly nightshade has 2 senses

• deadly nightshade(n = noun.plant) atropa belladonna, belladonna, belladonna plant - perennial Eurasian herb with reddish bell-shaped flowers and shining black berries; extensively grown in United States; roots and leaves yield atropine; Array
is a kind of herb, herbaceous plant
is a member of atropa, genus atropa

• deadly nightshade(n = noun.plant) bittersweet, bittersweet nightshade, climbing nightshade, poisonous nightshade, solanum dulcamara, woody nightshade - poisonous perennial Old World vine having violet flowers and oval coral-red berries; widespread weed in North America; Array
is a member of genus solanum, solanum
is a kind of nightshade