say it: BUHK-thawrn
buckthorn is a noun meaning "a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments". It carries 3 recorded senses.
any shrub or small tree of the genus Bumelia
an Old World plantain with long narrow ribbed leaves widely established in temperate regions
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for buckthorn come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.