noun. a thorny Eurasian bush with plumlike fruits.
- genus Prunus
- Prunus spinosa
noun. erect and almost thornless American hawthorn with somewhat pear-shaped berries.
- genus Crataegus
- Crataegus tomentosa
- pear haw
- pear hawthorn
Example sentences of the word blackthorn
1. Noun, singular or mass
Sloe blackthorn has needle-like spines that deter trespassers and larger wildlife, but it also grows thick enough to help block out sound from loud neighbors or from the street.