clump

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A clustered mass; a lump: clumps of soil.
2. n. A thick grouping, as of trees or bushes.
3. n. A heavy dull sound; a thud.
4. v. To form lumps or thick groupings.
5. v. To walk or move so as to make a heavy dull sound.
6. v. To gather into or form lumps or thick groupings of.

Century Dictionary and Cyclopedia

1. n. A thick, short, unformed piece of wood or other solid substance; a shapeless mass.
2. n. A cluster; a small, closely gathered group: used especially of trees or shrubs, but sometimes of other things and of persons.
3. n. A thick sole secured to an ordinary boot-sole by springs or by cement.
4. n. A small spiral curl of hair pressed flat between the disk-shaped ends of a pair of crimping-tongs, so as to lie close to the head.
5. n. A bivalve mollusk of the family Mactridæ, Lutraria elliptica. It has a broad flattish shell about 5 inches long and 3 inches high. It lives chiefly in muddy estuaries, buried a foot or two deep.
6. To walk heavily and clumsily.
7. n. An aggregation of bacteria resulting from the action of agglutinins. See serum diagnosis.
8. To form a clump or cluster; cluster; aggregate: said of the agglutination of certain bacteria in response to the action of definite substances. See serum diagnosis.
9. To form (bacteria) into a clump or cluster; agglutinate.

Wiktionary

1. n. A cluster or lump
2. n. A thick group or bunch, especially of bushes or hair.
3. n. A dull thud.
4. v. transitive To form clusters or lumps
5. v. transitive To gather into thick groups
6. v. intransitive To walk with a heavy footfalls.

GNU Webster's 1913

1. n. An unshaped piece or mass of wood or other substance.
2. n. A cluster; a group; a thicket.
3. n. The compressed clay of coal strata.
4. v. To arrange in a clump or clumps; to cluster; to group.
5. v. Prov. Eng. To tread clumsily; to clamp.

WordNet 3.0

1. v. walk clumsily
2. v. come together as in a cluster or flock
3. v. make or move along with a sound as of a horse's hooves striking the ground
4. n. a heavy dull sound (as made by impact of heavy objects)
5. n. a compact mass
6. v. gather or cause to gather into a cluster
7. n. a grouping of a number of similar things