clumpn.[Cf. D. klomp lump, G. klump, klumpen, Dan. klump, Sw. klump; perh. akin to L. globus, E. globe. Cf. Club.]1. An unshaped piece or mass of wood or other substance.()2. A cluster; a group; a thicket.()A clump of shrubby trees. (Hawthorne.)3. The compressed clay of coal strata.(Brande & C.)v. t. To arrange in a clump or clumps; to cluster; to group.(Blackmore.)v. i. To tread clumsily; to clamp.(Halliwell.)