| n. | 1. | (Bot.) A spreading thorny shrub or small tree (Prunus spinosa), with blackish bark, and bearing little black plums, which are called sloes; the sloe. |
| Noun | 1. | blackthorn - a thorny Eurasian bush with plumlike fruitsSynonyms: Prunus spinosa, sloe |
| 2. | blackthorn - erect and almost thornless American hawthorn with somewhat pear-shaped berries |
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