a solid mass, usually without a regular shape; a swelling or bump; a dull person
clump, mass
Cases of word usage
1) a thick, solid piece of lump cut off a loaf, meat, pineapple etc (chunk)
2) a lump (of earth or soil) (clod)
3) a semi-solid lump formed from liquid, especially blood (clot)
4) (usually brick-shaped) lump of metal (especially gold or silver) (ingot)
5) a lump of metal as found in the earth (nugget)
6) (a plant with) a rounded white lump (tuber) growing underground, eaten as a vegetable (potato)
7) a lump of soft material used to keep things apart or in place, or to stop up a hole; a collection (of banknotes, documents etc) folded or rolled together (wad)