/ Dictionary / Index C cocklebur: Meaning and Definition of Find definitions for: cock•le•bur Pronunciation: (kok'ul-bûr"), [key] — n. any composite plant of the genus Xanthium, comprising coarse weeds with spiny burs. the burdock, Arctium lappa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cocklebur (Thesaurus) cockleboat cockleshell Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language