- a small ball or mass of something
- a clump of roots/grass/mud
- There is a clump of bushes/trees at the edge of the field.
- a clump of spectators
- I could hear the clump of his footsteps as he came down the stairs.
- to form a mass or clump
- The virus causes the cells to clump (together).
- The virus clumps the cells together.
- I could hear him clumping [=clomping] down/up the stairs.