Pronunciation: (slō), [key]
1. the small, sour, blackish fruit of the blackthorn, Prunus spinosa, of the rose family.
2. the shrub itself.
3. any of various other plants of the genus Prunus, as a shrub or small tree, P. alleghaniensis, bearing dark-purple fruit.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.