Webster’s Revised Unabridged Dictionary · 1913
Clump
Clump (klŭmp), n. [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.
Clump, v. t. To arrange in a clump or clumps; to cluster; to group. Blackmore.
Clump, v. i. To tread clumsily; to clamp. [Prov. Eng.] Halliwell.