1. A thorny Eurasian bush with plumlike fruits
   "The blackthorn hedge provided an effective barrier, while its sloes were used to make gin";
   - sloe, Prunus spinosa
    
2. Erect and almost thornless American hawthorn with somewhat pear-shaped berries
   "The blackthorn produced abundant berries that autumn";
   - pear haw, pear hawthorn, Crataegus calpodendron, Crataegus tomentosa

Derived forms: blackthorns

Type of: bush, haw, hawthorn, shrub

Part of: Crataegus, genus Crataegus, genus Prunus, Prunus

Encyclopedia: Blackthorn, Oxfordshire