| Date: | 1200-1300 |
| Origin: | Probably from Low German klump |
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clump1

1 [countable] a group of trees, bushes, or other plants growing very close together
2 [countable + of] a small mass of something such as earth or mud
3 [uncountable] the sound of someone walking with heavy steps :
I heard the clump of Ralph's boots going up the stairs.
I heard the clump of Ralph's boots going up the stairs.