1. A clustered mass; a lump: clumps of soil.
2. A thick grouping, as of trees or bushes.
3. A heavy dull sound; a thud.
v. clumped, clump·ing, clumps
1. To form lumps or thick groupings.
2. To walk or move so as to make a heavy dull sound.
To gather into or form lumps or thick groupings of.
[Probably Low German klump, from Middle Low German klumpe, cluster of trees.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.