n. (also burr) 1 a a prickly clinging seed-case or flower-head. b any plant producing these. 2 a person hard to shake off. 3 = BURR n. 2. bur oak a n. American oak, Quercus macrocarpa with large fringed acorn-cups.
[ ME: cf. Da. burre bur, burdock, Sw. kard-borre burdock ]