The small, astringent, wild fruit of the blackthorn (Prunus spinosa).
The tree Prunus spinosa.
Any of various other plants of the genus Prunus, as a shrub or small tree, Prunus alleghaniensis, bearing dark-purple fruit.
Black or dark dyestuff.
Of a dark hue; moderately black; swarthy; tawny.
Black.
To make swart or tawny; blacken; tan.