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