Noun has 3 senses

• buckthorn(n = noun.plant) - a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments;





• buckthorn(n = noun.plant) - any shrub or small tree of the genus Bumelia;




• buckthorn(n = noun.plant) english plantain, narrow-leaved plantain, plantago lanceolata, ribgrass, ribwort, ripple-grass - an Old World plantain with long narrow ribbed leaves widely established in temperate regions;