- A clustered mass; a lump: clumps of soil. (noun)
- A thick grouping, as of trees or bushes. (noun)
- A heavy dull sound; a thud. (noun)
- To form lumps or thick groupings. (verb-intransitive)
- To walk or move so as to make a heavy dull sound. (verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.