a shrub or tree of the genus Crataegus, as C. calpodendron.
a walking stick made of a blackthorn tree or shrub.
Also called sloe. a much-branched, thorny, Old World shrub, Prunus spinosa, having white flowers and small plumlike fruits.

Origin of blackthorn

First recorded in 1350–1400, blackthorn is from the Middle English word blak thorn. See black, thorn Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for blackthorn

Historical Examples of blackthorn

  • They would not let any one cut a blackthorn shoot on Hallowe'en.

    The Book of Hallowe'en

    Ruth Edna Kelley

  • But when it was he who took the boys for their walk, the blackthorn went too—and was busy.

    Young Blood

    E. W. Hornung

  • Moreover, Blackthorn wore most of the clothes brought by the scullion.

    Children's Literature

    Charles Madison Curry

  • I had recovered it for him if it were not for that infernal Irishman with his blackthorn.

  • But I will be judged by any here, if the scar be not of my blackthorn's making.

British Dictionary definitions for blackthorn



Also called: sloe a thorny Eurasian rosaceous shrub, Prunus spinosa, with black twigs, white flowers, and small sour plumlike fruits
a walking stick made from its wood
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012