1. (noun)cocklebur, cockle-bur, cockleburr, cockle-burr any coarse weed of the genus Xanthium having spiny burrs Synonyms: greater burdock, cockleburr, greatburdock, cocklebur, cockle-burr, cockle-bur
2. (noun)great burdock, greater burdock, cocklebur, Arctium lappa burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use Synonyms: cockleburr, greatburdock, cocklebur, cockle-burr, greater burdock, cockle-bur